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  • Kinetics  (64)
  • Adult  (61)
  • Genes  (42)
  • Species Specificity  (35)
  • American Association for the Advancement of Science (AAAS)  (195)
  • Annual Reviews
  • Nature Publishing Group
  • 1980-1984  (195)
  • 1935-1939
  • 1982  (94)
  • 1980  (101)
  • 1939
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (195)
  • Annual Reviews
  • Nature Publishing Group
  • Springer  (16)
  • Wiley-Blackwell  (1)
Years
  • 1980-1984  (195)
  • 1935-1939
Year
  • 1
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    Human sleep: its duration and organization depend on its circadian phase (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-12-12
    Description: Two- to threefold variations in sleep length were observed in 12 subjects living on self-selected schedules in an environment free of time cues. The duration of polygraphically recorded sleep episodes was highly correlated with the circadian phase of the body temperature rhythm at bedtime and not with the length of prior wakefulness. Furthermore, the rate of REM (rapid eye movement) sleep accumulation , REM latency, bedtime selection, and self-rated alertness assessments were also correlated with the body temperature rhythm.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Czeisler, C A -- Weitzman, E d -- Moore-Ede, M C -- Zimmerman, J C -- Knauer, R S -- AG-00792/AG/NIA NIH HHS/ -- GM-07365/GM/NIGMS NIH HHS/ -- MH-28460/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1980 Dec 12;210(4475):1264-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434029" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Body Temperature ; *Circadian Rhythm ; Humans ; Male ; Middle Aged ; Sleep/*physiology ; Sleep, REM/physiology ; Wakefulness
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    Widespread occurrence in frogs and toads of skin compounds interacting with the ouabain site of Na+, K+-ATPase (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-02
    Description: Amphibians of the family Bufonidae contain high levels of skin compounds that both inhibit Na+- and K+-dependent adenosinetriphosphatase and antagonize the binding of ouabain to the enzyme. In species of Bufo and Atelopus, these compounds are relatively nonpolar bufodienolides, whereas Dendrophryniscus and Melanophryniscus contain more polar compounds of unknown structure. Skin extracts from 30 of 48 species of frogs representing an additional eight families contained relatively low levels of compounds that inhibit binding of ouabain to Na+,K+-adenosinetriphosphatase. The widespread occurrence of low levels of inhibitory compounds is consonant with the role for these compounds as physiological regulators of Na+,K+-adenosinetriphosphatase in amphibian skin; high levels in the Bufonidae probably also serve as a defense against some predators.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flier, J -- Edwards, M W -- Daly, J W -- Myers, C W -- New York, N.Y. -- Science. 1980 May 2;208(4443):503-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6245447" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura/*metabolism ; Binding Sites ; Bufanolides/pharmacology ; Ouabain/antagonists & inhibitors/*metabolism ; Skin/analysis/enzymology/*metabolism ; Sodium-Potassium-Exchanging ATPase/*metabolism ; Species Specificity ; Tissue Extracts/pharmacology
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  • 3
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    The phylogeny of prokaryotes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fox, G E -- Stackebrandt, E -- Hespell, R B -- Gibson, J -- Maniloff, J -- Dyer, T A -- Wolfe, R S -- Balch, W E -- Tanner, R S -- Magrum, L J -- Zablen, L B -- Blakemore, R -- Gupta, R -- Bonen, L -- Lewis, B J -- Stahl, D A -- Luehrsen, K R -- Chen, K N -- Woese, C R -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):457-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6771870" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/*classification ; Base Sequence ; Biological Evolution ; Chloroplasts/analysis ; Clostridium/classification ; Cyanobacteria/classification ; DNA/analysis ; *Phylogeny ; RNA, Ribosomal/*analysis ; Species Specificity
    Print ISSN: 0036-8075
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  • 4
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    DNA polymerases in parasitic protozoans differ from host enzymes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-02
    Description: Analysis of extracts of the bloodstream forms of Trypanosoma brucei showed that both DNA polymerase-alpha and DNA polymerase-beta activities were present. The detection of DNA polymerase-beta in T. brucei demonstrates the presence of this enzyme in unicellular organisms. DNA polymerase-beta is present also in Leishmania mexicana. The DNA polymerases in T. brucei are immunologically distinct from the host enzymes. The structural differences between the parasite and the host enzymes could be exploited for the development of agents to combat parasitic diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, L M -- Cheriathundam, E -- Mahoney, E M -- Cerami, A -- New York, N.Y. -- Science. 1980 May 2;208(4443):510-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367875" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Centrifugation, Density Gradient ; Chickens ; DNA Polymerase I/analysis ; DNA Polymerase II/analysis ; DNA Polymerase III/analysis ; DNA-Directed DNA Polymerase/*analysis ; Fishes ; Immune Sera ; Leishmania/*enzymology ; Molecular Weight ; Rabbits ; Rats ; Species Specificity ; Trypanosoma brucei brucei/*enzymology
    Print ISSN: 0036-8075
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  • 5
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    Single-nutrient microbial competition: qualitative agreement between experimental and theoretically forecast outcomes (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-28
    Description: When microbial strains compete for the same limiting nutrient in continuous culture, resource-based competition theory predicts that only one strain will survive and all others will die out. The surviving strain expected from theory will be the one with the smallest subsistence or "break-even" concentration of the limiting resource, a concentration defined by the J parameter. This prediction has been confirmed in the case of auxotrophic bacterial strains competing for limiting tryptophan. Because the value of J can be measured on the strains grown alone, the theory can predict the qualitative outcomes of mixed-growth competition in advance of actual competition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hansen, S R -- Hubbell, S P -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1491-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6767274" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/*growth & development ; Culture Media ; Drug Resistance, Microbial ; Escherichia coli/growth & development ; Kinetics ; Models, Theoretical ; Nalidixic Acid/pharmacology ; Nutritional Physiological Phenomena ; Pseudomonas aeruginosa/growth & development ; Tryptophan/metabolism
    Print ISSN: 0036-8075
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  • 6
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    Immunohistochemical localization of amelogenins in enameloid of lower vertebrate teeth (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-21
    Description: The indirect method of immunofluorescence was used to demonstrate the presence of amelogenins in the enameloid of teeth and dermal denticles of Chondrichthyes; in the enameloid of Teleostei and Amphibia; and in the enamel of Reptilia. Nonmammalian amelogenins are formed in the ectodermal cells of tooth organs and chemically are so similar to mammalian amelogenins that they interact with antiserum prepared from bovine enamel matrix.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Herold, R C -- Graver, H T -- Christner, P -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1357-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6986656" target="_blank"〉PubMed〈/a〉
    Keywords: Amelogenesis ; Animals ; Dental Enamel Proteins/immunology/*metabolism ; Fluorescent Antibody Technique ; Species Specificity ; Tooth/*anatomy & histology ; Vertebrates/*anatomy & histology
    Print ISSN: 0036-8075
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  • 7
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    Identical twins reared apart (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1323-5, 1327-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7188816" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Environment ; Female ; Genetics, Medical ; Humans ; Intelligence ; Male ; Pregnancy ; Twins/*psychology ; Twins, Monozygotic/*psychology
    Print ISSN: 0036-8075
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  • 8
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    Olfactory sensitivity in humans: genetic versus environmental control (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-09
    Description: Olfactory sensitivity to acetic acid, isobutyric acid, and 2-sec-butyl-cyclohexanone was tested in 97 adult male twin pairs to determine the extent to which variation in odor perception was genetically determined. Analysis of the data revealed no evidence for heritability of olfactory sensitivity. However, factors significantly associated with odor perception included cigar, pipe, and cigarette smoking; body fatness; alcohol consumption; and diabetes mellitus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hubert, H B -- Fabsitz, R R -- Feinleib, M -- Brown, K S -- New York, N.Y. -- Science. 1980 May 9;208(4444):607-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7189296" target="_blank"〉PubMed〈/a〉
    Keywords: Acetates ; Adult ; Alcohol Drinking ; Butyrates ; Cyclohexanones ; *Environment ; Female ; *Genes ; Humans ; Male ; Middle Aged ; Pregnancy ; Sensory Thresholds ; Skinfold Thickness ; Smell/*physiology ; Smoking ; *Twins ; Twins, Dizygotic ; Twins, Monozygotic
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  • 9
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    Swim bladder volume maintenance related to initial oceanic migratory depth in silver-phase Anguilla rostrata (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-27
    Description: Gas deposition rates in the swim bladders of postmetamorphic (silver) Anguilla rostrata eels are about five times greater than those of premetamorphic (yellow) individuals. This extends the maximum depth at which silver eels can maintain swim bladder volume and prepares them for their spawning migration to the Sargasso Sea.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleckner, R C -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1481-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384792" target="_blank"〉PubMed〈/a〉
    Keywords: Acclimatization ; Air Sacs/*physiology ; Anguilla/*physiology ; Animals ; Species Specificity
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  • 10
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    Allele increasing susceptibility to human breast cancer may be linked to the glutamate-pyruvate transaminase locus (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-25
    Description: The patterns of the occurrence of breast cancer in 11 high-risk families were evaluated by segregation and linkage analysis. These patterns were consistent with the hypothesis that increased susceptibility to breast cancer was inherited as an autosomal dominant allele with high penetrance in women. The postulated susceptibility allele in these families may be chromosomally linked to the glutamate-pyruvate transaminase (E.C. 2.6.1.2, alanine aminotransferase) locus. Confirmation of this linkage in other families would establish the existence of a gene increasing susceptibility to breast cancer. Since there is no association in the general population between a woman's glutamate-pyruvate transaminase genotype and her cancer risk, the glutamate-pyruvate transaminase linkage cannot be used as a screening test for breast cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉King, M C -- Go, R C -- Elston, R C -- Lynch, H T -- Petrakis, N L -- New York, N.Y. -- Science. 1980 Apr 25;208(4442):406-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367867" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine Transaminase/*genetics ; Alleles ; Breast Neoplasms/*genetics/transmission ; Female ; Genes ; Genetic Linkage ; Humans ; Pedigree ; X Chromosome
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  • 11
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    NIH shaken by death of research volunteer (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):475-6, 478-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394512" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Anorexia Nervosa ; Female ; *Human Experimentation ; Humans ; *Jurisprudence ; Lithium ; *National Institutes of Health (U.S.) ; *Patient Selection ; *Research ; *Research Subjects ; Sleep ; United States ; Vomiting
    Print ISSN: 0036-8075
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  • 12
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    Tooth induction in chick epithelium: expression of quiescent genes for enamel synthesis (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-29
    Description: Intraocular grafts of chick epithelium combined with mouse molar mesenchyme produced a variety of dental structures including perfectly formed crowns with differentiated ameloblasts depositing enamel matrix. The results suggest that the loss of teeth in Aves did not result from a loss of genetic coding for enamel synthesis in the oral epithelium but from an alteration in the tissue interactions requisite for odontogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kollar, E J -- Fisher, C -- New York, N.Y. -- Science. 1980 Feb 29;207(4434):993-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352302" target="_blank"〉PubMed〈/a〉
    Keywords: *Amelogenesis ; Animals ; Chick Embryo/*cytology ; Culture Techniques ; Dental Enamel Proteins/*biosynthesis/genetics ; Embryonic Induction ; Epithelial Cells ; Genes ; Mandible/cytology ; Mesoderm/cytology ; Mice ; *Odontogenesis
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  • 13
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    Immunoglobulin gene rearrangement in immature B cells (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: Two types of immature B cells, namely fetal liver hybridomas and the leukemic cell line 70Z/3, both of which have cytoplasmic mu chains but no light chains, were examined for DNA rearrangements of their light chain and heavy chain immunoglobulin genes. In the fetal liver hybridomas, which were constructed from fetal liver cells and a tumor cell, no light chain gene rearrangement was observed, whereas in the 70Z/3 cell line a kappa light chain rearrangement probably occurred. The results suggest that, although the lack of light chain synthesis can be due to a lack of gene rearrangement, there may also be transcriptional regulation, which may also be important for the expression of light chain immunoglobulins in immature B cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maki, R -- Kearney, J -- Paige, C -- Tonegawa, S -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1366-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6774416" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*immunology ; Genes ; Hybrid Cells/immunology ; Immunoglobulin Constant Regions/genetics ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin Light Chains/*genetics ; Immunoglobulin Variable Region/genetics ; Immunoglobulin kappa-Chains/*genetics ; Immunoglobulin mu-Chains/*genetics ; Leukemia, Experimental/*immunology ; Liver/*embryology ; Mice ; Recombination, Genetic ; Transcription, Genetic
    Print ISSN: 0036-8075
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  • 14
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    Mutations in a nonessential viral gene permit bacteriophage T4 to form plaques on Escherichia coli valS ts relA (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-11
    Description: During viral development bacteriophage T4 modifies the valyl-transfer RNA synthetase of its host Escherichia coli, but the function of the modification has remained elusive. A strain of Escherichia coli has now been identified which is nonpermissive for wild-type bacteriophage T4, but permissive for bacteriophage mutants impaired in the modification reaction. A comparison with other bacteria suggests that nonpermissiveness is due to synthesis of a thermolabile valyl-transfer RNA synthetase and relaxed control of RNA accumulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marchin, G L -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):294-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6992274" target="_blank"〉PubMed〈/a〉
    Keywords: Escherichia coli/*genetics ; *Genes, Viral ; *Mutation ; Species Specificity ; T-Phages/*genetics ; Viral Plaque Assay
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  • 15
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    The heart is a target organ for androgen (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-15
    Description: Autoradiographic and biochemical analyses of the hearts of female rhesus monkeys and baboons indicate that atrial and ventricular myocardial cells contain androgen receptors. Although the specific effects of nuclear uptake and retention of androgen on the function of heart muscle cells are not known, the presence of this receptor suggests that sex steroid hormones may affect myocardial function directly and may explain some of the peculiar differences in heart disease between men and women.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGill, H C Jr -- Anselmo, V C -- Buchanan, J M -- Sheridan, P J -- New York, N.Y. -- Science. 1980 Feb 15;207(4432):775-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6766222" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/*metabolism ; Animals ; Coronary Disease/*etiology ; Dihydrotestosterone/metabolism ; Estradiol/metabolism ; Female ; Haplorhini ; Kinetics ; Macaca mulatta ; Myocardium/*metabolism ; Papio ; Receptors, Androgen/*metabolism ; Receptors, Steroid/*metabolism ; Sex Factors
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  • 16
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    Buprenorphine suppresses heroin use by heroin addicts (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-08
    Description: Heroin-dependent men were given buprenorphine (a partial opiate agonist-antagonist) or a placebo under duoble-blind conditions on a clinical research ward where they could acquire heroin (21 to 40.5 milligrams per day, intravenously). Buprenorphine significantly (P less than .001) suppressed the self-administration of heroin over 10 days. Control subjects took between 93 and 100 percent of the available heroin. The effects of buprenorphine were dose-dependent; a dose of 8 milligrams per day reduced heroin use by 69 to 98 percent; a dose of 4 milligrams per day reduced heroin use by 45 percent. Termination of buprenorphie maintenance did not result in opiate withdrawal signs or symptoms. The subjects liked buprenorphine and indicated that it was preferable to methadone or naltrexone. Buprenorphine should be a safe and effective new pharmacotherapy for heroin dependence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mello, N K -- Mendelson, J H -- New York, N.Y. -- Science. 1980 Feb 8;207(4431):657-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352279" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Buprenorphine/adverse effects/*therapeutic use ; Double-Blind Method ; Heroin Dependence/*drug therapy ; Humans ; Informed Consent ; Morphinans/*therapeutic use ; Substance Withdrawal Syndrome/prevention & control ; Substance-Related Disorders/prevention & control
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  • 17
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    Insertion of a new gene of viral origin into bone marrow cells of mice (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: DNA containing the herpes simplex virus thymidine kinase (HSVtk) gene was used to transform wild-type tk+ mouse L cells to a tk++ status in vitro using methotrexate as a selective agent. HSVtk DNA was also used to transform mouse bone marrow cells in vitro. Transformed marrow cells injected into irradiated and methotrexate-treated recipient mice gave rise to proliferating cells which in some cases dominated the marrow population and which contained HSVtk gene sequences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mercola, K E -- Stang, H D -- Browne, J -- Salser, W -- Cline, M J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1033-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6246577" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow/*enzymology ; Bone Marrow Transplantation ; DNA, Viral/analysis ; Drug Resistance ; *Genes, Viral ; L Cells (Cell Line) ; Methotrexate/pharmacology ; Mice ; Simplexvirus/enzymology/*genetics ; Species Specificity ; Thymidine Kinase/*genetics ; *Transformation, Genetic
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  • 18
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    Evolutionary conservation of repetitive sequence expression in sea urchin egg RNA's (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: Cloned repetitive DNA sequences were used to determine the number of homologous RNA transcripts in the eggs of two sea urchin species, Strongylocentrotus purpuratus and S. franciscanus. The eggs of these species contain different amounts of RNA, and their genomes contain different numbers of copies of the cloned repeats. The specific pattern of repetitive sequence representation in the two egg RNA's is nonetheless quantitatively similar. The evolutionary conservation of this pattern suggests the functional importance of repeat sequence expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, G P -- Costantini, F D -- Posakony, J W -- Davidson, E H -- Britten, R J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1046-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6154974" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Biological Evolution ; DNA, Recombinant ; Female ; Nucleic Acid Hybridization ; Ovum/physiology ; Plasmids ; RNA/*genetics ; Sea Urchins/*genetics ; Species Specificity ; Transcription, Genetic
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  • 19
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    Intercellular adhesion: coconstruction of contractile heart tissue by cells of different species (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-06
    Description: Dissociated embryonic rat myocardial cells and chick myocardial cells labeled with radioactive isotope coaggregate and establish intercellular junctions. These bispecific cells reconstruct synchronously beating myocardial tissue within 24 hours of culture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nag, A C -- Cheng, M -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1150-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Adhesion ; *Cell Aggregation ; Cells, Cultured ; Chickens ; Heart/*embryology ; Intercellular Junctions/ultrastructure ; Mosaicism ; Myocardial Contraction ; Myocardium/*cytology ; Rats ; Species Specificity
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  • 20
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    J genes for heavy chain immunoglobulins of mouse (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-05
    Description: A 15,8-kilobase pair fragment of BALB/c mouse liver DNA, cloned in the Charon 4A lambda phage vector system, was shown to contain the mu heavy chain constant region (CHmu) gene for the mouse immunoglobulin M. In addition, this fragment of DNA contains at least two J genes, used to code for the carboxyl terminal portion of heavy chain variable regions. These genes are located in genomic DNA about eight kilobase pairs to the 5' side of the CHmu gene. The complete nucleotide sequence of a 1120-base pair stretch of DNA that includes the two J genes has been determined.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Newell, N -- Richards, J E -- Tucker, P W -- Blattner, F R -- New York, N.Y. -- Science. 1980 Sep 5;209(4461):1128-32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250219" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites, Antibody/*genetics ; DNA Restriction Enzymes ; DNA, Recombinant ; Genes ; Genetic Linkage ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin Variable Region/*genetics ; Immunoglobulin mu-Chains/*genetics ; Mice
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  • 21
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    Gene affecting superoxide dismutase activity linked to the histocompatibility complex in H-2 congenic mice (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-04
    Description: The activity of cyanide-sensitive, Cu-Zn superoxide dismutase (SOD) was studied in liver sytosols from H-2 congenic strains of mice. Higher SOD activity was found in livers of mice having H-2b/A.BY, B10, and C3H.SW/haplotypes than in those of H-2a, H-2k and H-2d haplotypes. Segregation studies supported these correlations. In H-2 recombinant strains of mice, the genes influencing the liver SOD activity occur, as ascertained by mapping techniques, at or near the H-2d region of the major histocompatibility complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Novak, R -- Bosze, Z -- Matkovics, B -- Fachet, J -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):86-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350646" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Genes ; Genes, Regulator ; Genetic Linkage ; H-2 Antigens/*genetics ; Liver/enzymology ; *Major Histocompatibility Complex ; Mice ; Superoxide Dismutase/*genetics
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  • 22
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    Calcium regulation during stimulus-secretion coupling: continuous measurement of intracellular calcium activities (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-07-25
    Description: Accurate measurements of intracellular calcium activities in salivary gland epithelial cells of the insect Phormia regina were obtained with microelectrodes in which N,N'-di(11-ethoxycarbonyl)undecyl-N,N'-4,5-tetramethyl-3,6-dioxaoctane diacid diamide wsa incorporated in a liquid membrane system. When calibrated in solutions approximating the ionic concentration of the cell interior, these microelectrodes gave rapid stable responses that were linear functions of the logarithm of calcium activities and were not affected by potassium, sodium and magnesium. Continuous monitoring of calcium activities during serotonin-induced saliva release provided direct evidence of hormonal influence on transmembrane calcium movement and spontaneous regulation of intracellular calcium by stimulated cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Doherty, J -- Youmans, S J -- Armstrong, W M -- Stark, R J -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):510-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394518" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport/drug effects ; Calcium/*metabolism ; Diptera/*metabolism ; Epithelium/metabolism ; Kinetics ; Magnesium/pharmacology ; Microelectrodes ; Salivary Glands/drug effects/*metabolism ; Serotonin/pharmacology
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  • 23
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    DDT contamination at Wheeler National Wildlife Refuge (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-25
    Description: Disposal of industrial waste resulted in massive DDT contamination at Wheeler National Wildlife Refuge, Alabama. Nearly a decade after the cessation of DDT manufacturing at the facility responsible, concentrations of DDT residues in the local fauna are still high enough to suggest avian reproductive impairment and mortality. Populations of fish-eating birds are low, endangered species are being exposed, and muscle lipids of game birds contain up to 6900 parts of DDT (isomers and metabolites) per million.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Shea, T J -- Fleming, W J -- Cromartie, E -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):509-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394517" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birds ; DDT/*analysis ; Ducks ; *Industrial Waste ; Lipids/analysis ; Muscles/analysis ; Rabbits ; Species Specificity
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  • 24
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    Altering genotype and phenotype by DNA-mediated gene transfer (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: Transformation, or DNA-mediated gene transfer, permits the introduction of new genetic information into a cell and frequently results in a change in phenotype. The transforming DNA is ultimately integrated into a recipient cell chromosome. No unique chromosomal locations are apparent, different lines contain the transforming DNA on different chromosomes. Expression of transformed genes frequently results in the synthesis of new polypeptide products which restore appropriate mutant cells to the wild-type phenotype. Thus transformation provides an in vivo assay for the functional role of DNA sequence organization about specific genes. Transforming genes coding for selectable functions, such as adenine phosphoribosyltransferase or thymidine kinase, have now been isolated by utilizing transformation in concert with molecular cloning. Finally, transformation may provide a general approach to the analysis of complex heritable phenotypes by permitting the distinction between phenotypic changes without concomitant changes in DNA and functional genetic rearrangements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pellicer, A -- Robins, D -- Wold, B -- Sweet, R -- Jackson, J -- Lowy, I -- Roberts, J M -- Sim, G K -- Silverstein, S -- Axel, R -- CA 16346/CA/NCI NIH HHS/ -- CA 17477/CA/NCI NIH HHS/ -- CA 23767/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1414-22.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414320" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine Phosphoribosyltransferase/*genetics ; Cloning, Molecular/methods ; DNA/*genetics ; *DNA, Recombinant ; Genes ; Genotype ; Mutation ; Pentosyltransferases/*genetics ; Phenotype ; Recombination, Genetic ; Selection, Genetic ; Thymidine Kinase/*genetics ; *Transformation, Genetic
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  • 25
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    Sperm-egg interaction: evidence for boar sperm plasma membrane receptors for porcine zona pellucida (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-01-04
    Description: Freshly ejaculated, noncapacitated boar sperm bind rapidly and in large numbers to pig egg zona pellucida in vitro. In the present study, the number of sperm bound decreased sharply when sperm motility was lowered by energy poisons or by reducing the temperature. Highly motile sperm from humans, guinea pigs, and rats, added at concentrations ten times higher than control sperm, did not bind to the porcine zona. At the same high concentration, a small number of hamster and bull sperm bound to the zona. Binding of boar sperm to the zona pellucida was blocked almost completely by diluted whole antiserum to sperm plasma membranes and by univalent (Fab) antibody to these membranes. When antibody to sperm plasma membrane was first absorbed with plasma membrane vesicles, sperm binding was not inhibited. These results provide direct evidence for the existence of sperm plasma membrane receptors for the zona pellucida of the pig.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peterson, R N -- Russell, L -- Bundman, D -- Freund, M -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):73-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7188647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Cell Membrane/metabolism ; Female ; *Fertilization ; Guinea Pigs ; Humans ; Immunoglobulin Fab Fragments ; Male ; Ovum/*metabolism ; Rats ; Receptors, Drug/metabolism ; Species Specificity ; *Sperm-Ovum Interactions ; Spermatozoa/*metabolism ; Swine ; Zona Pellucida/*metabolism
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    Nerve terminals are as metabolically different as the muscle fibers they innervate (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-11-21
    Description: The rate at which glucose enters nerve terminals in muscle was estimated indirectly by measuring changes in miniature end-plate potential frequency D-Glucose entered nerve terminals in muscles with a fast twitch more rapidly than it entered those with a slow twitch. This suggests that nerve terminals in fast- and slow-twitch muscles differ in their rate of metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pickett, J B -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):927-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434009" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Diaphragm/innervation ; Glucose/*metabolism ; Kinetics ; Membrane Potentials ; Nerve Endings/*metabolism ; Neuromuscular Junction/*metabolism ; Osmolar Concentration ; Rats
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  • 27
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    Blood lead concentrations in a remote Himalayan population (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-12-05
    Description: The lead content in the air at the foothills of the Himalayas in Nepal was found to be negligible. The concentration of lead in the blood of 103 children and adults living in this region was found to average 3.4 micrograms per deciliter, a level substantially lower than that found in industrialized populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Piomelli, S -- Corash, L -- Corash, M B -- Seaman, C -- Mushak, P -- Glover, B -- Padgett, R -- ES-01104/ES/NIEHS NIH HHS/ -- ES-26437/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1135-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444442" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Air Pollutants/*analysis ; Child, Preschool ; China ; Environment ; Female ; Humans ; *Industry ; Lead/*blood ; Male ; Nepal
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  • 28
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    Regional assignment of genes for human esterase D and retinoblastoma to chromosome band 13q14 (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-05-30
    Description: The expression of human esterase D was evaluated quantitatively and qualitatively in five persons with partial deletions or duplications of chromosome 13. The results showed that the locus of this enzyme is at band 13q14. Deletion of this same band in other subjects has been found previously to indicate a predisposition to the development of retinoblastoma, which was present in the four individuals in this study who had partial deletions of chromosome 13. Because of this close synteny, esterase D evaluation should aid in the diagnosis and genetic counseling of retinoblastoma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sparkes, R S -- Sparkes, M C -- Wilson, M G -- Towner, J W -- Benedict, W -- Murphree, A L -- Yunis, J J -- New York, N.Y. -- Science. 1980 May 30;208(4447):1042-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375916" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Deletion ; Chromosome Mapping ; *Chromosomes, Human, 13-15 ; Esterases/*genetics ; Female ; Genes ; Humans ; Intellectual Disability/enzymology/genetics ; Male ; Retinoblastoma/enzymology/*genetics
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  • 29
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    Directed deletion of a yeast transfer RNA intervening sequence (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-19
    Description: Many eukaryotic genes contain intevening sequences, segments of DNA that interrupt the continuity of the gene. They are removed from RNA transcripts of the gene by a process known as splicing. The intervening sequence in a yeast tyrosine transfer RNA (tRNA Tyr) suppressor gene was deleted in order to test its role in the expression of the gene. The altered gene and its parent were introduced into yeast by transformation. Both genes exhibited suppressor function, showing that the intervening sequence is not absolutely essential for the expression of this gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, R B -- Johnson, P F -- Tanaka, S -- Schold, M -- Itakura, K -- Abelson, J -- CA10984/CA/NCI NIH HHS/ -- GM 26391/GM/NIGMS NIH HHS/ -- GM 35658/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1396-400.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6997991" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Chromosome Deletion ; DNA, Recombinant ; Genes ; Mutation ; Nucleic Acid Precursors/genetics ; Plasmids ; RNA, Fungal/*genetics ; RNA, Transfer/*genetics ; Saccharomyces cerevisiae/genetics ; Suppression, Genetic ; Tyrosine
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  • 30
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    Methylphenidate and hyperactivity: effects on teacher behaviors (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-06-13
    Description: Teacher interactions with hyperactive and comparison boys were observed during classroom activities. A double-blind, methylphenidate-placebo cross-over design was used within the hyperactive group. With no knowledge of any child's diagnosis or drug status, the teacher was more intense and controlling toward hyperactive boys taking placebo than toward either medicated hyperactive boys or comparison boys; her behavior did not differ toward the latter two groups. Discussion focused on the need to consider the broad social ramifications of pharmacologic treatment programs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Whalen, C K -- Henker, B -- Dotemoto, S -- New York, N.Y. -- Science. 1980 Jun 13;208(4449):1280-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375940" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Behavior/drug effects ; Child ; Humans ; Hyperkinesis/*drug therapy ; *Interpersonal Relations ; Male ; Methylphenidate/pharmacology/*therapeutic use ; *Teaching
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    Pituitary gonadotropin-releasing hormone receptors during the rat estrous cycle (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-22
    Description: The binding of [6-alanine]gonadotropin-releasing hormone to pituitary plasma membranes increased threefold between metestrus and early proestrus in female rats. Receptor numbers fell rapidly on the afternoon of proestrus coincident with the preovulatory gonadotropin surge. The numbers of receptors for gonadotropin-releasing hormone were positively correlated with concentrations of estradiol in serum; this pattern may be a necessary component of increased pituitary sensitivty to gonadotropin-releasing hormone observed during proestrus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Savoy-Moore, R T -- Schwartz, N B -- Duncan, J A -- Marshall, J C -- New York, N.Y. -- Science. 1980 Aug 22;209(4459):942-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250218" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/metabolism ; Estradiol/blood ; *Estrus ; Feedback ; Female ; Follicle Stimulating Hormone/blood ; Gonadotropin-Releasing Hormone/analogs & derivatives/*metabolism ; Kinetics ; Luteinizing Hormone/blood ; Pituitary Gland, Anterior/*metabolism ; Pregnancy ; Progesterone/blood ; Rats ; Receptors, Cell Surface/*metabolism
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  • 32
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    Glutamine synthetase: assimilatory role in liver as related to urea retention in marine chondrichthyes (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-04-18
    Description: The levels of gluatmine synthetase specific activity in hepatic and renal tissue are higher in fish that are ureosmoregulators than in those that are not. Enzyme activities in the liver and kidney of 18 species of fish correlated directly with the ureosmoregulatory adaptation of each species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Webb, J T -- Brown, G W Jr -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):293-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6102799" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia/metabolism ; Animals ; Brain/enzymology ; Fishes/*metabolism ; Glutamate-Ammonia Ligase/*metabolism ; Kidney/enzymology ; Liver/enzymology ; Species Specificity ; Urea/*metabolism ; Water-Electrolyte Balance
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    Rate of acoustic change may underlie hemispheric specialization for speech perception (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-21
    Description: Phonemically similar syllables, differing only by temporal acoustic cues, were presented dichotically to investigate temporal processing mechanisms in hemispheric specialization for speech. Reducing the rate of acoustic change within syllables while keeping their phonemic characteristics constant significantly decreased the characteristic asymmetry in processing speech.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwartz, J -- Tallal, P -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1380-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355297" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Auditory Pathways/physiology ; Auditory Perception/*physiology ; Brain/*physiology ; Female ; *Functional Laterality ; Humans ; Linguistics ; Male ; Speech Perception/*physiology ; Time Factors
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    Human aging and spatial vision (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-12
    Description: The ability to see spatial structures of a wide range of sizes was measured for two groups of observers (mean ages, 18 and 73 years). All observers had good visual acuity. Although older and younger observers did not differ in ability to see targets with fine structure (high spatial frequencies), older observers were only one-third as sensitive to targets with coarse structure (low spatial frequencies) as were younger observers or to changes in criterion. Older observers were also less able than younger observers to see moving targets. The reduced sensitivity of the older observers may adversely affect routine perceptual activities, such as face recognition and visually guided postural behavior, that depend upon low spatial frequencies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sekuler, R -- Hutman, L P -- Owsley, C J -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1255-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403884" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; *Aging ; Humans ; Motion Perception/physiology ; Size Perception/*physiology ; Space Perception/*physiology ; Visual Acuity
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    Measurement of intracellular free calcium in monkey kidney cells with aequorin (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-07-16
    Description: A method has been developed for the measurement of intracellular free calcium in mammalian cells. The calcium-sensitive photoprotein aequorin can be incorporated into isolated cells by hypo-osmotic treatment without altering the cell viability, permeability, or metabolism. Intracellular calcium activity (Cai2+) was monitored in a perfusion system. In monkey kidney cells (LLC-MK2), Cai2+ is approximately 57 nanomoles per liter. Changes in Cai2+ with time can also be followed: exposure of the cells to anaerobiosis or the calcium ionophore A23187 reversibly increases Cai2+. The method has also been successfully tested in rat hepatocytes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Borle, A B -- Snowdowne, K W -- New York, N.Y. -- Science. 1982 Jul 16;217(4556):252-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6806904" target="_blank"〉PubMed〈/a〉
    Keywords: *Aequorin ; Anaerobiosis ; Animals ; Calcimycin/pharmacology ; Calcium/*metabolism ; Cell Line ; Kidney/drug effects/*metabolism ; Kinetics ; *Luminescent Proteins ; Macaca mulatta
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    Micromolar affinity benzodiazepine receptors: identification and characterization in central nervous system (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-06-11
    Description: Receptors that selectively bind micromolar concentrations of benzodiazepines are present in rat brain membrane. These micromolar receptors exhibit saturable, stereospecific binding, and the potency of benzodiazepine binding to these receptors is correlated with the ability of the benzodiazepines to inhibit maximum electric shock-induced convulsions. Benzodiazepine receptors with nanomolar affinity differ from the micromolar receptors in their binding, kinetic, and pharmacologic characteristics. The micromolar receptors also bind phenytoin, a non-benzodiazepine anticonvulsant. These results provide evidence for a distinct class of clinically relevant benzodiazepine receptors that may regulate neuronal excitability and anticonvulsant activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bowling, A C -- DeLorenzo, R J -- NS 1352/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1982 Jun 11;216(4551):1247-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6281893" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Benzodiazepines/*metabolism/pharmacology ; Benzodiazepinones/metabolism ; Brain/*metabolism ; Calmodulin/antagonists & inhibitors ; Diazepam/metabolism ; Kinetics ; Ligands ; Protein Kinase Inhibitors ; Rats ; Receptors, Drug/*metabolism ; Receptors, GABA-A ; Structure-Activity Relationship
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    Artificial enzymes (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-11-05
    Description: Simple chemical catalysts have been designed to achieve some desirable features of enzymes. These novel catalysts are not proteins, but they may incorporate the typical enzyme catalytic groups and they achieve selectivity in their reactions by use of geometric control, as do enzymes. Catalysts that carry out geometrically controlled chlorinations of aromatic rings and steroids have been constructed. Other catalysts achieve the selective synthesis of amino acids, and still others imitate ribonuclease in detailed mechanism and hydrolyze RNA. Optimization of geometries has led to a rate acceleration of over 10(8) in one instance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Breslow, R -- New York, N.Y. -- Science. 1982 Nov 5;218(4572):532-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123255" target="_blank"〉PubMed〈/a〉
    Keywords: Catalysis ; Cyclodextrins ; *Enzymes ; Kinetics ; Models, Chemical ; Ribonucleases ; Structure-Activity Relationship ; Substrate Specificity ; Transaminases
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    Long-term synaptic potentiation in the superior cervical ganglion (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-03-12
    Description: Brief tetanic stimulation of the preganglionic nerves to the superior cervical ganglion enhances the postganglionic response to single preganglionic stimuli for 1 to 3 hours. This long-term potentiation of transmission through the ganglion is apparently not attributable to a persistent muscarinic action of the preganglionic neurotransmitter, acetylcholine, since neither the magnitude nor the time course of the phenomenon is reduced by atropine. The decay of long-term potentiation can be described by a first-order kinetic process with a mean time constant of 80 minutes. We conclude that long-term potentiation, once considered a unique property of the hippocampus, is in fact a more general feature of synaptic function. This form of synaptic memory may significantly influence information processing and control in other regions of the nervous system, including autonomic ganglia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, T H -- McAfee, D A -- 12116/PHS HHS/ -- NS 16576/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1982 Mar 12;215(4538):1411-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6278593" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ganglia, Sympathetic/*physiology ; Kinetics ; Learning/*physiology ; Neuronal Plasticity ; Rats ; Synapses/*physiology ; *Synaptic Transmission ; Time Factors
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    Evidence that glucose "marks" beta cells resulting in preferential release of newly synthesized insulin (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-10-01
    Description: Studies of isolated islets labeled with radioactive leucine show that glucose at a critical time "marks" islets in such a way as to cause preferential release of newly synthesized insulin. The preferential release of insulin from marked islets is relatively independent of subsequent secretagogues or rates of insulin secretion. Previous kinetic studies have indicated that the critical time at which marking occurs is after proinsulin biosynthesis but before the secretory event. Thus, secretory cells may regulate the diversion of newly synthesized material for immediate release as it is approaching or transiting the Golgi apparatus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gold, G -- Gishizky, M L -- Grodsky, G M -- AM 01410/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1982 Oct 1;218(4567):56-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6181562" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Methyl-3-isobutylxanthine/pharmacology ; Animals ; Glucose/*pharmacology ; In Vitro Techniques ; Insulin/biosynthesis/*secretion ; Islets of Langerhans/drug effects/*secretion ; Kinetics ; Leucine ; Potassium/pharmacology ; Tolbutamide/pharmacology
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  • 40
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    Modulation of striatal dopaminergic function by local injection of 5'-N-ethylcarboxamide adenosine (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-10-01
    Description: Rats rotated to the left when 5'-N-ethylcarboxamide adenosine (NECA) was injected into the left caudate nucleus and apomorphine was administered subcutaneously. The combination of NECA and apomorphine was more potent than L-(phenylisopropyl)adenosine and apomorphine in eliciting rotation, suggesting the involvement of adenosine receptors of the Ra type. The response was reduced when 2',5'-dideoxyadenosine was injected along with NECA into the caudate nucleus or when theorphylline was given intraperitoneally. Higher doses of apomorphine elicited a self-mutilatory response after the injection of NECA into the caudate nucleus. These results suggest that adenosine may be involved in the modulation of dopaminergic function in the striatum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Green, R D -- Proudfit, H K -- Yeung, S M -- New York, N.Y. -- Science. 1982 Oct 1;218(4567):58-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123218" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine/administration & dosage/*analogs & derivatives/pharmacology ; Adenosine-5'-(N-ethylcarboxamide) ; Animals ; Apomorphine/pharmacology ; Caudate Nucleus/*physiology ; Corpus Striatum/*physiology ; Dopamine/*physiology ; Injections ; Kinetics ; Male ; Motor Activity/drug effects ; Rats ; Rats, Inbred Strains ; Rotation ; Vasodilator Agents/*pharmacology
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    Human immunoglobulin heavy chain genes map to a region of translocations in malignant B lymphocytes (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-04-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kirsch, I R -- Morton, C C -- Nakahara, K -- Leder, P -- New York, N.Y. -- Science. 1982 Apr 16;216(4543):301-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6801764" target="_blank"〉PubMed〈/a〉
    Keywords: B-Lymphocytes/*physiology ; Chromosome Mapping ; Genes ; Humans ; Immunoglobulin Heavy Chains/*genetics ; Leukemia/*genetics ; Recombination, Genetic ; Translocation, Genetic
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    Fetal hemoglobin genes turned on in adults (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-12-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1982 Dec 24;218(4579):1295-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6183747" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Anemia, Sickle Cell/therapy ; Azacitidine/therapeutic use ; Fetal Hemoglobin/biosynthesis/*genetics ; Hemoglobin, Sickle/biosynthesis ; Humans ; Male ; Thalassemia/therapy
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    Complete amino acid sequence of urotensin I, a hypotensive and corticotropin-releasing neuropeptide from Catostomus (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-10-08
    Description: Urotensin I, purified from extracts of the urophysis of a teleost fish (Catostomus commersoni), exhibits potent hypotensive activity (mammals and birds) and corticotropin-releasing activity (both fish and mammals). The primary structure of this 41-residue peptide was determined to be H-Asn-Asp-Asp-Pro-Pro-Ile-Ser-Ile-Asp-Leu-Thr-Phe-His-Leu-Leu-Arg-Asn-Met-Ile-Glu - Met-Ala-Arg-Ile-Glu-Asn-Glu-Arg-Glu-Gln-Ala-Gly-Leu-Asn-Arg-Lys-Tyr-Leu-Asp-Glu -Val-NH2. Extraction with 0.1N HCl at 100 degrees C cleaves the amino-terminal tripeptide, yeilding a fully active analog, urotensin I(4-41). The amino acid sequence was confirmed by measuring the biological activity of synthetic urotensin I(4-41). Urotensin I exhibits a striking sequence homology with ovine corticotropin-releasing factor and with frog sauvagine. These three peptides exhibit similar activities in biological test systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lederis, K -- Letter, A -- McMaster, D -- Moore, G -- Schlesinger, D -- New York, N.Y. -- Science. 1982 Oct 8;218(4568):162-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6981844" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Corticotropin-Releasing Hormone ; Fishes ; Peptides/*isolation & purification ; Species Specificity ; Urotensins/*isolation & purification
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    Repeated DNA still in search of a function (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-08-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1982 Aug 13;217(4560):621-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6283639" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; DNA/*genetics ; DNA Transposable Elements ; DNA, Satellite/genetics ; *Repetitive Sequences, Nucleic Acid ; Species Specificity
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    Identification of the constant chromosome regions involved in human hematologic malignant disease (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-05-14
    Description: Specific consistent chromosome translocations are regularly observed in certain human leukemias and lymphomas. For the myeloid leukemias, the constant recombinants are: the long arm of 9 to chromosome 22 in chronic myeloid leukemia, the long arm of 21 to chromosome 8 in acute myeloblastic leukemia, and the long arm of 17 to chromosome 15 in acute promyelocytic leukemia. Three related translocations are seen in Burkitt lymphoma and B cell acute lymphocytic leukemia; in each one, chromosome 8 is involved with chromosome 2, 14, or 22. Analysis of a complex translocation affecting chromosomes 8 and 14 indicates that the translocation of chromosome 8 to chromosome 14 is the critical constant rearrangement. The analysis of the DNA at the translocation sites of these chromosomes, rather than the reciprocal of each translocation, appears to be the most productive focus for initial study. The various immunoglobulin loci are located in chromosomes 2, 14, and 22, the chromosomes regularly involved in translocations in Burkitt lymphoma and B cell acute lymphocytic leukemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rowley, J D -- CA 16910/CA/NCI NIH HHS/ -- CA 19266/CA/NCI NIH HHS/ -- CA 25568/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1982 May 14;216(4547):749-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7079737" target="_blank"〉PubMed〈/a〉
    Keywords: *Chromosome Aberrations ; Chromosomes, Human, 13-15 ; Chromosomes, Human, 16-18 ; Chromosomes, Human, 21-22 and Y ; Chromosomes, Human, 6-12 and X ; Genes ; Humans ; Immunoglobulins/*genetics ; Leukemia/*genetics ; Lymphoma/*genetics ; Translocation, Genetic
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    Preferential attack of mitochondrial DNA by aflatoxin B1 during hepatocarcinogenesis (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-01-01
    Description: Administration of the hepatic carcinogen aflatoxin B1 to experimental animals results in covalent binding to liver mitochondrial DNA at concentrations three to four times higher than nuclear DNA. The concentration of carcinogen adducts in mitochondrial DNA remains unchanged even after 24 hours, possible because of lack of excision repair. Similarly, mitochondrial transcription and translation remain inhibited up to 24 hours suggesting long-term effects of aflatoxin B1 on the mitochondrial genetic system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Niranjan, B G -- Bhat, N K -- Avadhani, N G -- CA-22762/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1982 Jan 1;215(4528):73-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6797067" target="_blank"〉PubMed〈/a〉
    Keywords: Aflatoxin B1 ; Aflatoxins/*metabolism ; Animals ; DNA, Mitochondrial/*metabolism ; Kinetics ; Liver Neoplasms/*chemically induced/metabolism ; Male ; Mitochondria, Liver/*metabolism ; Neoplasms, Experimental/chemically induced ; Protein Biosynthesis/drug effects ; Rats ; Transcription, Genetic/drug effects
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    Brain injury causes a time-dependent increase in neuronotrophic activity at the lesion site (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-08-27
    Description: A cavity was made in the brain (entorhinal cortex) of developing or adult rats, and a small piece of Gelfoam was emplaced to collect fluid secreted into the wound. The neuronotrophic activity of the fluid was assayed with sympathetic and parasympathetic neurons in culture. The results show that wounds in the brain of developing or adult rats stimulate the accumulation of neuronotrophic factors and that the activity of these factors increases over the first few days after infliction of the damage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nieto-Sampedro, M -- Lewis, E R -- Cotman, C W -- Manthorpe, M -- Skaper, S D -- Barbin, G -- Longo, F M -- Varon, S -- AG-00538/AG/NIA NIH HHS/ -- MH-19691/MH/NIMH NIH HHS/ -- NS-16349/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1982 Aug 27;217(4562):860-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7100931" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic Fibers/physiology ; Animals ; Brain/*physiology ; Brain Injuries/*physiopathology ; Cell Survival/drug effects ; Cells, Cultured ; Cholinergic Fibers/physiology ; Kinetics ; Nerve Growth Factors/*metabolism/pharmacology ; *Nerve Regeneration ; Rats ; Rats, Inbred Strains ; Wound Healing
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  • 48
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    Somatic mutation in genes for the variable portion of the immunoglobulin heavy chain (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-04-16
    Description: The size of the gene pool potentially encoding antibodies to p-azophenyl arsonate has been examined. A heavy chain-specific full-length complementary DNA clone has been constructed with the use of messenger RNA from a hybridoma that produces antibodies to the arsonate hapten and bears nearly a full complement of the determinants comprising the cross-reactive idiotype (CRI). The sequences of both the complementary DNA clone and the corresponding immunoglobulin heavy chain have been independently determined. A probe for the variable region gene was prepared from the original heavy chain complementary DNA clone and used to analyze, by Southern filter hybridization, genomic DNA from both A/J (CRI positive) and BALB/c (CRI negative) mice. Approximately 20 to 25 restriction fragments containing "germline" variable region gene segments were detected in both strains, and many are shared by both, Since 35 CRI-positive heavy chains have been partially sequenced thus far and 31 are different, the results of the hybridization analysis suggest that somatic mutation events involving the variable region gene segments of the heavy chain play a role in the origin of the amino acid sequence diversity seen in this system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sims, J -- Rabbitts, T H -- Estess, P -- Slaughter, C -- Tucker, P W -- Capra, J D -- A112127/PHS HHS/ -- AI-06020/AI/NIAID NIH HHS/ -- AI18016/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1982 Apr 16;216(4543):309-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6801765" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites, Antibody/*genetics ; Genes ; Haptens ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin Idiotypes/genetics ; Immunoglobulin Variable Region/*genetics ; Mice ; *Mutation
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  • 49
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    Norethisterone, a major ingredient of contraceptive pills, is a suicide inhibitor of estrogen biosynthesis (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-03-05
    Description: Norethisterone (17 alpha-ethynyl-19-nortestosterone) is an effective irreversible inhibitor of estrogen synthetase (aromatase), the enzyme responsible for the conversion of androgens to estrogens, even at a 2 X 10(-6) molar concentration. This irreversible inactivation, which is directed toward the active site of aromatase and requires the cofactor-reduced nicotinamide adenine dinucleotide phosphate, is both time- and concentration-dependent. Ethisterone (17 alpha-ethynyltestosterone), in contrast, is not a suicide inhibitor of aromatase even at concentrations of 10(-4) molar.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Osawa, Y -- Yarborough, C -- HDO4945/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1982 Mar 5;215(4537):1249-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7058343" target="_blank"〉PubMed〈/a〉
    Keywords: *Aromatase Inhibitors ; Binding Sites/drug effects ; Contraceptives, Oral/*pharmacology ; Estrogens/*biosynthesis ; Female ; Humans ; Kinetics ; Microsomes/enzymology ; Norethindrone/*pharmacology ; Oxidoreductases/*antagonists & inhibitors ; Placenta/enzymology ; Pregnancy
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    Manipulation of event-related potential manifestations of information processing stages (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-11-26
    Description: The timing of two event-related potential components was differentially affected by two experimental variables. The earlier component (NA) was affected by degradation of the stimuli and the later component (N2) by the nature of a classification task. The results support the hypothesis that NA and N2 reflect sequential stages of information processing, namely, pattern recognition and stimulus classification.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ritter, W -- Simson, R -- Vaughan, H G Jr -- Macht, M -- HD 10804/HD/NICHD NIH HHS/ -- IF32 AGO-5193/AG/NIA NIH HHS/ -- MH 06723/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1982 Nov 26;218(4575):909-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7134983" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Adult ; Brain/*physiology ; Brain Mapping ; Cognition/*physiology ; Discrimination (Psychology)/physiology ; Evoked Potentials ; Humans ; Information Theory ; Perception/*physiology ; Time Factors
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    Subperiosteal expansion and cortical remodeling of the human femur and tibia with aging (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-09-03
    Description: Increases with aging in subperiosteal dimensions and second moments of area (measures of bending and torsional rigidity) in femoral and tibial cross sections are documented in an archeological sample from the American Southwest. Significant differences between cross-sectional sites and between sexes in the pattern of cortical remodeling with age are also present. These differences appear to be related to variations in the stress or strain levels in different regions of the femur and tibia which result from in vivo mechanical loadings of the lower limb.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ruff, C B -- Hayes, W C -- AM00749/AM/NIADDK NIH HHS/ -- AM26740/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1982 Sep 3;217(4563):945-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7112107" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; *Aging ; Bone Development ; Female ; Femur/*physiology ; Fractures, Bone/etiology ; Growth ; Humans ; Male ; Middle Aged ; Periosteum/*physiology ; Physical Exertion ; Sex Characteristics ; Stress, Mechanical ; Tibia/*physiology
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    Wound tissue can utilize a polymeric template to synthesize a functional extension of skin (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-01-08
    Description: Prompt and long-term closure of full-thickness skin wounds is guinea pigs and humans is achieved by applying a bilayer polymeric membrane. The membrane comprises a top layer of a silicone elastomer and a bottom layer of a porous cross-linked network of collagen and glycosaminoglycan. The bottom layer can be seeded with a small number of autologous basal cells before grafting. No immunosuppression is used and infection, exudation, and rejection are absent. Host tissue utilizes the sterile membrane as a culture medium to synthesize neoepidermal and neodermal tissue. A functional extension of skin over the entire wound area is formed in about 4 weeks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yannas, I V -- Burke, J F -- Orgill, D P -- Skrabut, E M -- GM 21700/GM/NIGMS NIH HHS/ -- GM 23946/GM/NIGMS NIH HHS/ -- HL 14322/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1982 Jan 8;215(4529):174-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7031899" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Animals ; Burns/*therapy ; Cells, Cultured ; Child ; Child, Preschool ; Collagen/therapeutic use ; Female ; Glycosaminoglycans/therapeutic use ; Guinea Pigs ; Humans ; Male ; Middle Aged ; Silicone Elastomers/therapeutic use ; *Skin Transplantation ; *Wound Healing
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Translational efficiency of transfer RNA's: uses of an extended anticodon (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-11-12
    Description: Transfer RNA's are probably very strongly selected for translational efficiency. In this article, the argument is presented that the coding performance of the triplet anticodon is enhanced by selection of a matching anticodon loop and stem sequence. the anticodon plus these nearby sequence features (the extended anticodon) therefore contains more coding information than the anticodon alone and can perform more efficiently and accurately at the ribosome. This idea successfully accounts for the relative efficiencies of many transfer RNA's.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yarus, M -- New York, N.Y. -- Science. 1982 Nov 12;218(4573):646-52.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6753149" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Escherichia coli/genetics ; Kinetics ; Nucleic Acid Conformation ; *Protein Biosynthesis ; RNA, Transfer/*genetics ; Ribosomes/metabolism ; Structure-Activity Relationship ; Suppression, Genetic
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    A revolution in biology (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abelson, J -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1319-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251541" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cloning, Molecular/methods ; DNA Transposable Elements ; *DNA, Recombinant ; Drug Industry ; Eukaryotic Cells/physiology ; Forecasting ; Genes ; Immunoglobulins/genetics ; Molecular Biology/*trends ; Mutation ; Transformation, Genetic
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    Glutamine- and N-acetylglutamate-dependent carbamoyl phosphate synthetase in elasmobranchs (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-04-18
    Description: High levels of glutamine- and N-acetyl-L-glutamate-dependent carbamoyl phosphate synthetase activity are present in liver extracts of marine species of fish that retain high levels of urea in their tissues for the purpose of osmoregulation. The function of the synthetase in these species appears to be related to urea synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, P M -- New York, N.Y. -- Science. 1980 Apr 18;208(4441):291-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6245445" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbamoyl-Phosphate Synthase (Ammonia)/*metabolism ; Carbamoyl-Phosphate Synthase (Glutamine-Hydrolyzing)/*metabolism ; Fishes/*metabolism ; Glutamates/metabolism ; Liver/enzymology ; Phosphotransferases/*metabolism ; Species Specificity ; Urea/metabolism
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    Human taste: response and taste bud number in fungiform papillae (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-15
    Description: The number of basic taste qualities registered by single human fungiform papillae is correlated with the number of taste buds borne on these papillae. Multiple sensitivity was demonstrated both in single fungiform papillae and in single taste buds, with response to all four of the basic taste qualities occuring in a single taste bud.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arvidson, K -- Friberg, U -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):807-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403846" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Humans ; Sensory Receptor Cells ; Taste/*physiology ; Taste Buds/cytology/*physiology ; Tongue/cytology/*innervation
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    Neurotransmitter release from a vertebrate neuromuscular synapse affected by a food dye (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-03-28
    Description: The food dye erythrosine (Erythrosin B; FD & C No. 3) was applied to isolated neuromuscular synapses in the frog, and its effects on the spontaneous quantal release of acetylcholine were examined with electrophysiological techniques. At concentrations of 10 muM or greater this anionic dye produced an irreversible, dose-dependent increase in neurotransmitter release. This increase did not depend on the presence of calcium ions in the bathing medium. These increase did not depend on the presence of calcium ions in the bathing medium. These results suggest that erythrosine might prove a useful pharmacological tool for studying the process of transmitter release, but that its use as a food additive should be reexamined.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Augustine, G J Jr -- Levitan, H -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1489-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6244619" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura ; Calcium/physiology ; Erythrosine/*pharmacology ; Fluoresceins/*pharmacology ; Kinetics ; Membrane Potentials/drug effects ; Motor Endplate/drug effects ; Neuromuscular Junction/*drug effects ; Rana pipiens ; Stimulation, Chemical ; Synaptic Transmission/*drug effects
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    Goal orientation by blindfolded humans after long-distance displacement: possible involvement of a magnetic sense (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-10-31
    Description: A wide range of animals are able to orient toward home when subjected to displacement-release experiments. When comparable experiments are performed on blindfolded humans, a similar ability emerges. Such goal-orientation does not result from following the complete journey on a mental map, nor is it influenced by cloud cover. Bar magnets worn on the head do seem to exert an influence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, R R -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):555-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423208" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Female ; Humans ; Magnetics ; Male ; Orientation/*physiology
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    Disorders of human hemoglobin (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-02-01
    Description: Studies of the human hemoglobin system have provided new insights into the regulation of expression of a group of linked human genes, the gamma-delta-beta-globin gene complex in man. In particular, the thalassemia syndromes and related disorders of man are inherited anemias that provide mutations for the study of the regulation of globin gene expression. New methods, including restriction enzyme analysis and cloning of cellular DNA, have made it feasible to define more precisely the structure and organization of the globin genes in cellular DNA. Deletions of specific globin gene fragments have already been found in certain of these disorders and have been applied in prenatal diagnosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bank, A -- Mears, J G -- Ramirez, F -- New York, N.Y. -- Science. 1980 Feb 1;207(4430):486-93.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352255" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Aberrations/genetics ; Chromosome Deletion ; Chromosome Disorders ; Fetal Hemoglobin/genetics ; Genes ; Genetic Linkage ; Globins/*genetics ; Hemoglobins/*biosynthesis ; Hemoglobins, Abnormal/*genetics ; Humans ; Nucleic Acid Precursors/genetics ; Polymorphism, Genetic ; RNA, Messenger/genetics ; Thalassemia/*genetics
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    Antibody to spermine: a natural biological constituent (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-06
    Description: A protein that binds spermine specifically was separated from normal rabbit serum by affinity chromatography. Immunoelectrophoresis, the Ouchterlony immunodiffusion test, and gradient gel electrophoresis indicated that this protein has immunoglobulin characteristics and consists of several populations of antibodies to spermine. These were sequentially released from Sepharose-spermine gel by step-wise elution with solutions ranging in pH from 4 to 1. The binding constants varied from 5.0 x 10(8) to 11.1 x 10(8) liters per mole. These globulins did not react with monoacetylputrescine, L-ornithine, L-lysine, and histamine. Negligible cross-reactivity was detected with spermidine, putrescine, N8-monoacetylspermidine, cadaverine, and diaminopropane. Since perturbations in polyamine metabolism have been identified in several diseases, the study of extracellular polyamine homeostasis may reveal an important regulatory function for this protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bartos, D -- Bartos, F -- Campbell, R A -- Grettie, D P -- Smejtek, P -- New York, N.Y. -- Science. 1980 Jun 6;208(4448):1178-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375929" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies/*isolation & purification ; Binding Sites, Antibody ; Chromatography, Affinity ; Homeostasis ; Immunoglobulin G/isolation & purification ; Kinetics ; Rabbits ; Spermine/*immunology/metabolism
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    Does malnutrition affect fecundity? A summary of evidence (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-05-09
    Description: Moderate chronic malnutrition has only a minor effect on fecundity (reproductive capacity), and the resulting effect on fertility (actural reproduction) is very small. Among the fecundity components examined here in noncontracepting populations, age at menarche and the duration of lactational amenorrhea appear to be the ones most affected by malnutrition. But from neither of those effects can a difference in fertility of more than a few percent be expected between poorly and well-nourished women in developing countries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bongaarts, J -- New York, N.Y. -- Science. 1980 May 9;208(4444):564-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367878" target="_blank"〉PubMed〈/a〉
    Keywords: Abortion, Induced ; Adolescent ; Adult ; Age Factors ; Behavior ; Birth Intervals ; Contraception ; Female ; *Fertility ; Fetal Death/epidemiology ; Humans ; Lactation ; Male ; Marriage ; Menarche ; Menopause ; Middle Aged ; Nutrition Disorders/*physiopathology ; Nutritional Physiological Phenomena ; Ovulation ; Pregnancy ; Spermatogenesis
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    Tritiated imipramine binding sites are decreased in platelets of untreated depressed patients (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-11
    Description: The high-affinity binding of triatiated imipramine to platelet membranes was compared in samples from 16 untreated depressed women and 21 age-matched controls of the same sex. The maximal binding in the depressed group was significantly lower than that of the controls, although the affinity constants were similar. These results suggest that binding of tritiated imipramine in human platelets may represent a biochemical index of depression, possibly reflecting similar changes in the brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Briley, M S -- Langer, S Z -- Raisman, R -- Sechter, D -- Zarifian, E -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):303-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384806" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Blood Platelets/*analysis ; Cell Membrane/metabolism ; Depression/*blood ; Humans ; Imipramine/*blood ; Kinetics ; Middle Aged ; Receptors, Drug/*metabolism
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    A bank for Nobel sperm (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Broad, W J -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1326-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355292" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Female ; Humans ; *Insemination, Artificial ; *Insemination, Artificial, Heterologous ; Male ; *Nobel Prize ; *Spermatozoa ; *Tissue Banks ; Tissue Donors
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    Excitatory and inhibitory effects of serotonin on sensorimotor reactivity measured with acoustic startle (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-25
    Description: Serotonin infused into the lateral ventricle in rats produced a dose-dependent depression of the acoustic startle reflex. When infused onto the spinal cord, serotonin produced a dose-dependent increase in startle. Thus the same neurotransmitter can modulate the same behavior in opposite ways, depending on which part of the central nervous system is involved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, M -- Strachan, D I -- Kass, E -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):521-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394520" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dose-Response Relationship, Drug ; Kinetics ; Male ; Rats ; Reflex, Acoustic/*drug effects ; Reflex, Startle/*drug effects ; Serotonin/*pharmacology
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    Tissue specificity of enzyme expression regulated by diffusible factors: evidence in Drosophila hybrids (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-02-29
    Description: Pairs of hybridizable species of Hawaiian picture-winged Drosophila differ qualitatively in the distributions of specific enzymes in their tissues. An examination of the patterns of enzyme expression in the hybrids showed that, in three instances, absence of an enzyme from a specific tissue was dominant to presence. Since other developmental features indicated that both parental genomes were functioning, these results suggest that, in these cases, the pattern differences in the parental species were due to diffusible factors that affected expression of the relevant structural genes rather than to differences in the genes themselves or in cis-acting regulatory sites.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dickinson, W J -- New York, N.Y. -- Science. 1980 Feb 29;207(4434):995-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352303" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/enzymology ; Alcohol Oxidoreductases/genetics ; Aldehyde Oxidoreductases/genetics ; Animals ; Drosophila/embryology/*enzymology/genetics ; Genes ; *Genes, Regulator ; Hybridization, Genetic ; Malpighian Tubules/enzymology ; Octanols ; Tissue Distribution
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    Biological and sociocultural effects on handedness: comparison between biological and adoptive families (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-12
    Description: Data from adoption studies on handedness indicate that the effects of shared biological heritage are more powerful determinants of hand preference than sociocultural factors. Biological offspring were found to show nonrandom distributions of right- and non-right-handedness as a function of parental handedness; these distributions were consistent with the results fo previous family studies. In contrast, the handedness distribution of adopted children as a function of parental handedness was essentially random.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carter-Saltzman, L -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1263-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403887" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adoption ; Adult ; Cultural Characteristics ; *Environment ; *Functional Laterality ; Genetics ; Humans ; Sociology
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    DNA gyrase and the supercoiling of DNA (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-02-29
    Description: Negative supercoiling of bacterial DNA by DNA gyrase influences all metabolic processes involving DNA and is essential for replication. Gyrase supercoils DNA by a mechanism called sign inversion, whereby a positive supercoil is directly inverted to a negative one by passing a DNA segment through a transient double-strand break. Reversal of this scheme relaxes DNA, and this mechanism also accounts for the ability of gyrase to catenate and uncatenate DNA rings. Each round of supercoiling is driven by a conformational change induced by adenosine triphosphate (ATP) binding: ATP hydrolysis permits fresh cycles. The inhibition of gyrase by two classes of antimicrobials reflects its composition from two reversibly associated subunits. The A subunit is particularly associated with the concerted breakage-and-rejoining of DNA and the B subunit mediates energy transduction. Gyrase is a prototype for a growing class of prokaryotic and eukaryotic topoisomerases that interconvert complex forms by way of transient double-strand breaks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cozzarelli, N R -- New York, N.Y. -- Science. 1980 Feb 29;207(4434):953-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6243420" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/metabolism ; Animals ; DNA Topoisomerases, Type I/metabolism ; DNA Topoisomerases, Type II/genetics/*metabolism ; DNA, Superhelical/*metabolism ; Escherichia coli/enzymology ; Eukaryotic Cells/enzymology ; Genes ; Macromolecular Substances ; Nalidixic Acid/pharmacology ; Novobiocin/pharmacology ; Oxolinic Acid/pharmacology ; Substrate Specificity ; Topoisomerase II Inhibitors
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    Rand issues final alcoholism report (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):855-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355266" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Alcohol Drinking ; Alcoholism/*physiopathology/prevention & control/therapy ; Follow-Up Studies ; Humans ; Male
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  • 69
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    Consensus--more or less--on the Pap smear (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):672.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394525" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Female ; Humans ; Middle Aged ; *National Institutes of Health (U.S.) ; *Papanicolaou Test ; United States ; Uterine Cervical Neoplasms/*diagnosis ; *Vaginal Smears
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    Women gain parity in smoking-related ailments (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-02-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, J R -- New York, N.Y. -- Science. 1980 Feb 1;207(4430):509.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352257" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Female ; Humans ; Lung Neoplasms/epidemiology/*etiology ; Smoking/*complications
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  • 71
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    Phase variation: evolution of a controlling element (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-19
    Description: Phase variation in bacteria is regulated by homologous recombination at a specific DNA site. This recombinational event causes the inversion of a 970-base-pair DNA sequence that includes the promoter necessary for transcription of a flagellar gene. The invertible segment is flanked by two sites that are necessary for the inversion and contains a gene (hin) whose product mediates the inversion event. The hin gene shows extensive homology with the TnpR gene carried on the Tn3 transposon. It is also homologous with the gin gene carried on bacteriophage mu. These relationships suggest that the phase variation system may have evolved by the association of a transposon with a resident gene and the subsequent specialization of these elements to regulate flagellar antigen expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simon, M -- Zieg, J -- Silverman, M -- Mandel, G -- Doolittle, R -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1370-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251543" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Proteins/*genetics ; Base Sequence ; *DNA Transposable Elements ; DNA, Bacterial/genetics ; Flagellin/*genetics ; Genes ; Recombination, Genetic ; Salmonella/*genetics
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  • 72
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    Recombinant DNA revisited (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Singer, M -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1317.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414317" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *DNA, Recombinant ; Genes ; Humans ; Molecular Biology/trends
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 73
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    Faster cholinergic REM sleep induction in euthymic patients with primary affective illness (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-04-11
    Description: Arecoline, a cholinergic muscarinic receptor agonist, induced rapid eye movement sleep significantly more rapidly in patients with primary affective illness in remission than in normal control subjects matched for age and sex. These results, and others, suggest that patients with primary affective illness may have a supersensitive cholinergic system both when they are ill and when their symptoms are in clinical remission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sitaram, N -- Nurnberger, J I Jr -- Gershon, E S -- Gillin, J C -- New York, N.Y. -- Science. 1980 Apr 11;208(4440):200-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7361118" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Affective Symptoms/drug therapy/*physiopathology ; Arecoline/*pharmacology ; Female ; Humans ; Injections, Intravenous ; Male ; Sleep Wake Disorders/physiopathology ; Sleep, REM/*drug effects
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  • 74
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    Panel asks "when is a person dead"? (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-08-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):669-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394524" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; *Brain Death ; Child ; *Death ; Humans ; *Legislation, Medical ; *Religion and Medicine ; United States
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  • 75
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    Anxiety and muscle tension as consequences of caffeine withdrawal (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-09-26
    Description: Regular consumers of caffeine had higher muscle tension after three or more hours of abstinence than low caffeine consumers. This difference was absent after double-blind administration of caffeine citrate or placebo. In a discriminative reaction time test, caffeine treatment improved performance. Among subjects receiving placebo, anxiety was highly correlated with prior caffeine use, suggesting that even a brief abstinence may produce anxiety in the regular user.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉White, B C -- Lincoln, C A -- Pearce, N W -- Reeb, R -- Vaida, C -- AA 03513/AA/NIAAA NIH HHS/ -- HD 05958/HD/NICHD NIH HHS/ -- NS 11618/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1980 Sep 26;209(4464):1547-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7433978" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Anxiety/*etiology ; Caffeine/*pharmacology ; Humans ; Muscle Contraction/*drug effects ; Substance Withdrawal Syndrome/complications/*physiopathology
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    Genetic variation in the human insulin gene (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-08-01
    Description: Four recombinant lambda phages containing nucleotide sequences complementary to a cloned human preproinsulin DNA probe have been isolated from human DNA. Restriction analyses in conjunction with Southern hybridizations reveal two types of gene sequences. One isolate of each type was subjected to complete nucleotide sequence determination. The sequences contain the entire preproinsulin messenger RNA region, two intervening sequence. 260 nucleotides upstream from the messenger RNA capping site, and 35 nucleotides beyond the polyadenylate attachment site. Our results strongly suggest that these two gene types are allelic variants of a single insulin gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ullrich, A -- Dull, T J -- Gray, A -- Brosius, J -- Sures, I -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):612-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6248962" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cloning, Molecular ; *Dna ; DNA Restriction Enzymes ; DNA, Recombinant/metabolism ; *Genes ; Genetic Code ; *Genetic Variation ; Humans ; Insulin/*biosynthesis ; Nucleic Acid Hybridization ; Proinsulin/biosynthesis ; Rats ; Species Specificity
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  • 77
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    Electrophysiological signs of split-second decision-making (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-02-08
    Description: When young adults detected auditory stimuli at split-second intervals, different components of the event-related brain potentials showed markedly different speeds of recovery. The P3 component (latency 300 to 350 milliseconds) was fully recovered at intervals of less than 1.0 second, while the N1--P2 components (latencies 100 to 180 milliseconds) were markedly attenuated with stimulus repetition even at longer interstimulus intervals. Thus, the N1--P2 recovers much more slowly than a subject's ability to evaluate signals, whereas the P3 appears to be generated at the same high rates as the decision processes with which it is associated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Woods, D L -- Hillyard, S A -- Courchesne, E -- Galambos, R -- New York, N.Y. -- Science. 1980 Feb 8;207(4431):655-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352278" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Auditory Perception/physiology ; Brain/*physiology ; Cognition/physiology ; Decision Making/*physiology ; Evoked Potentials ; Humans ; Memory/physiology ; Time Factors
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  • 78
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    Carboxyhemoglobin levels in an unstable hemoglobin disorder (Hb Zurich): effect on phenotypic expression (1980)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1980-07-18
    Description: The affinity of Hb Zurich for carbon monoxide is approximately 65 times that of normal hemoglobin. The carboxyhemoglobin content in serum from individuals with Hb Zurich ranged from 3.9 to 6.7 percent in nine nonsmokers and from 9.8 to 19.7 percent in six smokers. Rates of hemolysis and hemoglobin denaturation were less in smokers than in nonsmokers, effects that may be secondary to the stabilization of Hb Zurich by carbon monoxide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zinkham, W H -- Houtchens, R A -- Caughey, W S -- New York, N.Y. -- Science. 1980 Jul 18;209(4454):406-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384813" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Carboxyhemoglobin/*analysis/genetics ; Child ; Female ; Hematocrit ; Hemoglobins/*analysis ; Hemoglobins, Abnormal/*analysis/genetics ; Humans ; Male ; Middle Aged ; Phenotype ; Smoking
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    Proton nuclear magnetic resonance of intact Friend leukemia cells: phosphorylcholine increase during differentiation (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-06-18
    Description: Proton nuclear magnetic resonance of intact Friend leukemia cells was used to analyze their erythroid-like differentiation. The technique, which requires only 10(3) to 10(9) cells and approximately 2 minutes for acquisition of each spectrum, demonstrated the occurrence of many signal changes during differentiation. With cell extracts, 64 signals were assigned to 12 amino acids and 19 other intermediary metabolites, and a dramatic signal change was attributed to a fourfold increase in cytoplasmic phosphorylcholines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Agris, P F -- Campbell, I D -- 1-F33-GM07826/GM/NIGMS NIH HHS/ -- 1-FOG-TW00440/TW/FIC NIH HHS/ -- New York, N.Y. -- Science. 1982 Jun 18;216(4552):1325-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7079765" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Choline/*analogs & derivatives ; Kinetics ; Leukemia, Experimental/*physiopathology ; Magnetic Resonance Spectroscopy ; Mice ; Phosphorylcholine/*analysis
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  • 80
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    Evidence of high natural radiation doses in certain mid-water oceanic organisms (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-10-01
    Description: Concentrations of the naturally occurring radioactive nuclide polonium-210 were determined in mid-water crustaceans and fish from depths to 1500 meters. Unusually high levels were found in certain categories of organisms, indicating that these organisms were exposed to a particularly high natural radiation dose. The results have implications in terms of possible radiation effects, as a baseline against which artificial radioactive nuclides can be compared, and as a potential technique for studying the feeding behavior of mid-water organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cherry, R D -- Heyraud, M -- New York, N.Y. -- Science. 1982 Oct 1;218(4567):54-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123217" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Crustacea/*physiology ; Fishes/*physiology ; Lead/*analysis ; Polonium/*analysis ; Radiation Dosage ; Radioisotopes/*analysis ; Seawater ; Species Specificity
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  • 81
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    Rotating shift work schedules that disrupt sleep are improved by applying circadian principles (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-07-30
    Description: Workers on rotating shifts dislike those aspects of their work schedules that violate circadian sleep-wake cycle physiology. Work schedule satisfaction, subjective health estimates, personnel turnover, and worker productivity improve when schedules are introduced that are designed to incorporate circadian principles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Czeisler, C A -- Moore-Ede, M C -- Coleman, R H -- New York, N.Y. -- Science. 1982 Jul 30;217(4558):460-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089576" target="_blank"〉PubMed〈/a〉
    Keywords: *Activity Cycles ; Adult ; Aged ; *Circadian Rhythm ; Health ; Humans ; Job Satisfaction ; Male ; Middle Aged ; *Sleep ; *Work
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  • 82
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    Chromosomal localization of the human homolog (c-sis) of the simian sarcoma virus onc gene (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-11-12
    Description: Nonrandom chromosome rearrangements of chromosome 22 have been identified in different human malignancies. As a result of Southern blot hybridization of a c-sis probe to DNA's from mouse-human somatic cell hybrids, the human homolog (c-sis) of the transforming gene of simian sarcoma virus was assigned to chromosome 22. Hybrids between thymidine kinase-deficient mouse cells and human fibroblasts carrying a translocation of the region q11-qter of chromosome 22 to chromosome 17 were also analyzed. These studies demonstrate that the human c-sis gene is on region 22q11 greater than qter.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dalla-Favera, R -- Gallo, R C -- Giallongo, A -- Croce, C M -- CA-10815/CA/NCI NIH HHS/ -- CA-16685/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1982 Nov 12;218(4573):686-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6291150" target="_blank"〉PubMed〈/a〉
    Keywords: *Cell Transformation, Viral ; Chromosome Mapping ; *Chromosomes, Human, 21-22 and Y ; Genes ; Humans ; *Oncogenes ; Retroviridae/*genetics ; Sarcoma Virus, Woolly Monkey/*genetics
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  • 83
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    Molecular biology of the sea urchin embryo (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-07-02
    Description: Research on the early development of the sea urchin offers new insights into the process of embryogenesis. Maternal messenger RNA stored in the unfertilized egg supports most of the protein synthesis in the early embryo, but the structure of maternal transcripts suggests that additional functions are also possible. The overall developmental patterns of transcription and protein synthesis are known, and current measurements describe the expression of specific genes, including the histone genes, the ribosomal genes, and the actin genes. Possible mechanisms of developmental commitment are explored for regions of the early embryo that give rise to specified cell lineages, such as the micromere-mesenchyme cell lineage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davidson, E H -- Hough-Evans, B R -- Britten, R J -- GM20927/GM/NIGMS NIH HHS/ -- HD05753/HD/NICHD NIH HHS/ -- RR00986/RR/NCRR NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1982 Jul 2;217(4554):17-26.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6178156" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/genetics ; Animals ; Base Sequence ; Blastocyst/physiology ; Embryo, Nonmammalian/*physiology ; Female ; Fertilization ; Gastrula/physiology ; Histones/genetics ; Kinetics ; Larva/physiology ; Polyribosomes/metabolism ; RNA/genetics ; RNA, Messenger/genetics ; Ribosomal Proteins/genetics ; Sea Urchins/*physiology ; Transcription, Genetic
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  • 84
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    Multiplication of tobacco mosaic virus in tobacco leaf disks is inhibited by (2'-5) oligoadenylate (1982)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1982-06-25
    Description: The oligonucleotide (2'-5') oligoadenylate that is induced in interferon-treated animal cells protects plant tissue from infection by the tobacco mosaic virus. This inhibition of virus multiplication was obtained at concentrations comparable to those affecting protein synthesis and antiviral activities in animal cells. After treatment with (2'-5') oligoadenylate, the multiplicability of tobacco mosaic virus was reduced by 80 to 90 percent as measured by enzyme-linked immunosorbent assay. These results, along with the observation that human interferon protects tobacco tissue from infection by tobacco mosaic virus, indicate that plants and animals may have a common pathway for virus resistance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Devash, Y -- Biggs, S -- Sela, I -- New York, N.Y. -- Science. 1982 Jun 25;216(4553):1415-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6178155" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine Nucleotides/*pharmacology ; Animals ; Cells, Cultured ; Interferons/pharmacology ; Kinetics ; Oligonucleotides/*pharmacology ; Oligoribonucleotides/*pharmacology ; Plants, Toxic ; Tobacco/microbiology ; Tobacco Mosaic Virus/*drug effects ; Virus Replication/drug effects
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    Decreased insulin receptors but normal glucose metabolism in Duchenne muscular dystrophy (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-04-16
    Description: Compared to matched controls, 17 patients with Duchenne muscular dystrophy showed decreased insulin binding to monocytes due to decreased receptor concentration. These patients showed no signs of altered glucose metabolism and retrospective analysis of the clinical records of a further 56 such patients revealed no modification in carbohydrate metabolism. These data suggest that reduced insulin receptor number does not produce overt modifications of glucose metabolism in Duchenne muscular dystrophy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DePirro, R -- Lauro, R -- Testa, I -- Ferretti, I -- De Martinis, C -- Dellatonio, R -- New York, N.Y. -- Science. 1982 Apr 16;216(4543):311-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7063889" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Cell Membrane/metabolism ; Child ; Glucose/*metabolism ; Humans ; Monocytes/metabolism ; Muscular Dystrophies/*metabolism ; Receptor, Insulin/*metabolism
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  • 86
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    Molecular drive (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-12-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dover, G A -- Strachan, T -- Coen, E S -- Brown, S D -- New York, N.Y. -- Science. 1982 Dec 10;218(4577):1069.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7146894" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; DNA/*genetics ; Genes ; Humans
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 87
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    Events in the evolution of pre-proinsulin (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-08-20
    Description: An extensive computer-assisted analysis of known pre-proinsulin coding sequences has shown correlations that can be interpreted as evidence for an intron-mediated juxtaposition of exons in the evolution of these genes. The evidence includes the discovery that the regions of the pre-proinsulin genes that code for the signal peptide consist of nearly tandem repeating units of nine base pairs. This pattern reappears in the C region of the genes after a large intron that occurs in three of the four genes analyzed. A model is proposed in which primordial insulin was coded for by two separate minigenes arising from a gene duplication, each with identical or nearly identical signal peptide coding regions. The minigenes fused into one transcriptional unit mediated by the large intron, and the signal peptide coding region of one of the putative minigenes evolved into the latter portion of the C peptide coding region.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Douthart, R J -- Norris, F H -- New York, N.Y. -- Science. 1982 Aug 20;217(4561):729-32.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7100918" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Biological Evolution ; Computers ; Cricetinae ; Disulfides ; Genes ; Humans ; Insulin ; Models, Genetic ; Proinsulin/*genetics ; Protein Precursors/*genetics ; Rats ; Repetitive Sequences, Nucleic Acid
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  • 88
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    Lipofuscin: resolution of discrepant fluorescence data (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-05-14
    Description: Lipofuscin granules (age pigments) emit yellow light under ultraviolet excitation in the fluorescence microscope. The reported blue emission maximum of extracts of lipofuscin-laden cells may result from instrumental bias. The major fluorescent components that accumulate with age in these lysosomal residual bodies of human retinal pigment epithelium are yellow-emitting fluorophores. Different age-related fluorophores, which do emit blue light, are derived from other intracellular sources. A reevaluation of the connection between blue-emitting lipid peroxidation products and the age-related lipofuscin granules of classical pathology is necessary.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eldred, G E -- Miller, G V -- Stark, W S -- Feeney-Burns, L -- EY 03274/EY/NEI NIH HHS/ -- EY 03408/EY/NEI NIH HHS/ -- EY 05456/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1982 May 14;216(4547):757-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7079738" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Age Factors ; Cytoplasmic Granules ; Humans ; *Lipofuscin ; Lysosomes/analysis ; Pigment Epithelium of Eye/analysis/ultrastructure ; *Pigments, Biological ; Spectrometry, Fluorescence ; Spectrum Analysis
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  • 89
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    Cystine transport is defective in isolated leukocyte lysosomes from patients with cystinosis (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-09-24
    Description: The activity of a cystine transport system in lysosomes prepared from the leukocytes of patients with cystinosis was found to be deficient. In normal subjects, this system was resistant to N-ethylmaleimide and demonstrated saturation kinetics. Lysosomes from individuals heterozygous for cystinosis demonstrated a reduced maximum velocity for cystine egress from lysosomes. The rate of cystine escape from normal lysosomes was enhanced by adenosine triphosphate. The availability of normal and mutant lysosomes provides a means of investigating mechanisms of amino acid transport across lysosomal membranes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gahl, W A -- Bashan, N -- Tietze, F -- Bernardini, I -- Schulman, J D -- New York, N.Y. -- Science. 1982 Sep 24;217(4566):1263-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7112129" target="_blank"〉PubMed〈/a〉
    Keywords: Biological Transport/drug effects ; Carrier Proteins/metabolism ; Cysteine/metabolism ; Cystine/*metabolism ; Cystinosis/*metabolism ; Ethylmaleimide/pharmacology ; Humans ; Kinetics ; Leukocytes/*metabolism ; Lysosomes/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 90
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    Identification of a BALB/c H-2Ld gene by DNA-mediated gene transfer (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-02-05
    Description: Gene transfer and immunoselection were used in the identification of a BALB/c genomic clone containing an H-2Ld gene (clone 27.5). Transformation of thymidine kinase-negative C3H mouse L cells with the cloned 27.5 DNA together with the herpes simplex virus tk gene produced transformants expressing Ld molecules detected by radioimmune assay with monoclonal hybridoma antibodies to Ld antigens. The foreign Ld gene products expressed by cloned mouse L cell transformants were shown to be virtually indistinguishable from BALB/c spleen Ld molecules by two-dimensional electrophoretic analysis of H-2Ld immunoprecipitates. These results indicate that the genomic clone 27.5 contains a functional BALB/c H-2Ld gene and demonstrate the usefulness of this approach for identifying the gene products encoded by cloned genes which are members of a multigene family. Furthermore, the ability to place cell-surface recognition molecules on the surfaces of foreign cells provides a powerful opportunity for functional analyses of these molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goodenow, R S -- McMillan, M -- Orn, A -- Nicolson, M -- Davidson, N -- Frelinger, J A -- Hood, L -- CA 22662/CA/NCI NIH HHS/ -- CA 26199/CA/NCI NIH HHS/ -- GM 06965/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1982 Feb 5;215(4533):677-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7058331" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Genes ; H-2 Antigens/*genetics ; Isoelectric Point ; L Cells (Cell Line) ; Mice ; Mice, Inbred BALB C/*genetics ; Transformation, Genetic
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  • 91
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    Mammalian tyrosinase catalyzes three reactions in the biosynthesis of melanin (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-09-17
    Description: The biosynthesis of melanin is initiated by the catalytic oxidation of tyrosine to dopa by tyrosinase in a reaction that requires dopa as a cofactor. Tyrosine then catalyzes the dehydrogenation of dopa to dopaquinone. The subsequent reactions can proceed spontaneously in vitro. Tyrosinase, purified from murine melanomas and the skins of brown mice, has now been shown to catalyze a third reaction in mammalian melanogenesis, namely the conversion of 5,6-dihydroxyindile to melanochrome. This reaction requires dopa as a cofactor and is inhibited by tyrosine. Conversely, 5,6-dihydroxyindole inhibits the oxidation of tyrosine to dopa, so that the relative concentrations of tyrosine and 5,6-dihydroxyindole within the mammalian pigment cell are capable of regulating melanogenesis in a previously unrecognized fashion. Tyrosinase has the unusual property of catalyzing three distinct reactions within a single biochemical pathway: the hydroxylation of a monophenol, the dehydrogenation of a catechol, and the dehydrogenation of a dihydroxyindole. The first and third of these reactions require dopa as a cofactor; in the second reaction, dopa is a substrate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Korner, A -- Pawelek, J -- DA-01147/DA/NIDA NIH HHS/ -- DA-05186/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1982 Sep 17;217(4565):1163-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6810464" target="_blank"〉PubMed〈/a〉
    Keywords: Catechol Oxidase/*metabolism ; Cells, Cultured ; Dihydroxyphenylalanine/metabolism ; Indoles/metabolism ; Kinetics ; Melanins/*biosynthesis ; Melanoma/enzymology ; Monophenol Monooxygenase/*metabolism ; Neoplasms, Experimental/enzymology ; Substrate Specificity ; Tyrosine/metabolism
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  • 92
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    Interspecies variations in mammalian lens metabolites as detected by phosphorus-31 nuclear magnetic resonance (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-03-26
    Description: Multiple interspecies differences were detected between humans and seven other mammals in 15 of the 24 metabolites measured in the intact crystalline lens and lens perchloric acid extracts. Generally, the number of statistically significant metabolite differences among the various species, relative to the human, increase in the following order: cat or approximately dog greater than pig greater than rat greater than sheep greater than rabbit greater than cow.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kopp, S J -- Glonek, T -- Greiner, J V -- New York, N.Y. -- Science. 1982 Mar 26;215(4540):1622-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7071581" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine Nucleotides/metabolism ; Animals ; Carbohydrate Metabolism ; Cats ; Choline/metabolism ; Dogs ; Humans ; Lens, Crystalline/*metabolism ; Magnetic Resonance Spectroscopy ; Phosphocreatine/metabolism ; Rabbits ; Rats ; Species Specificity
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  • 93
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    Amplification and adaptation in regulatory and sensory systems (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-07-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koshland, D E Jr -- Goldbeter, A -- Stock, J B -- New York, N.Y. -- Science. 1982 Jul 16;217(4556):220-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7089556" target="_blank"〉PubMed〈/a〉
    Keywords: *Acclimatization ; *Adaptation, Physiological ; Animals ; Environment ; Kinetics ; Mathematics ; Models, Biological ; Models, Neurological ; Sense Organs/*physiology ; Sensory Receptor Cells/physiology
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  • 94
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    Differential breakdown of phylogenetically diverse ribosomal RNA's inserted via liposomes into mammalian cells (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-07-02
    Description: Liposomes were used to deliver ribosomal RNA's from the different organisms into cultivated mouse plasmacytoma cells. Ribosomal RNA from Escherichia coli was degraded intracellularly within 1 hour, whereas mouse and yeast ribosomal RNA's were degraded more slowly. This indicates that cells can discriminated between different ribosomal RNA's.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lavelle, D -- Ostro, M J -- Giacomoni, D -- GM 27935/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1982 Jul 2;217(4554):59-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6178157" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Escherichia coli ; Kinetics ; *Liposomes ; Mice ; Molecular Weight ; Neoplasms, Experimental/metabolism ; Plasmacytoma/*metabolism ; RNA, Bacterial/metabolism ; RNA, Ribosomal/*metabolism ; Saccharomyces cerevisiae ; Species Specificity
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  • 95
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    Molecular drive: how real, how important? (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-11-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1982 Nov 5;218(4572):552-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7123257" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Genes ; *Genetics, Population
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  • 96
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    Pituitary receptor site blockade by a gonadotropin-releasing hormone antagonist in vivo: mechanism of action (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-04-23
    Description: Administration of a potent gonadotropin-releasing hormone (GnRH) antagonist [Nac-L-Ala1,pCl-D-Phe2,D-Trp3,6]GnRH as a single subcutaneous injection to castrated adult male rats reduced, by more than 90 percent, both serum luteinizing hormone concentrations and specific pituitary GnRH receptor binding. This effect persisted for 24 hours. The dissociation rate of the antagonist from pituitary membrane homogenates was fourfold slower than the dissociation rate of a potent agonist. The prolonged in vivo inhibition of pituitary GnRH receptor binding and luteinizing hormone secretion by the GnRH antagonist may be mediated by the slower dissociation rate of the antagonist from its specific pituitary membrane receptor site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heber, D -- Dodson, R -- Swerdloff, R S -- Channabasavaiah, K -- Stewart, J M -- New York, N.Y. -- Science. 1982 Apr 23;216(4544):420-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6280278" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Castration ; Follicle Stimulating Hormone/secretion ; Gonadotropin-Releasing Hormone/*antagonists & inhibitors ; Kinetics ; Luteinizing Hormone/*secretion ; Male ; Pituitary Gland/*metabolism ; Rats ; Receptors, Cell Surface/*drug effects/metabolism ; Receptors, LHRH
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  • 97
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    Rotational invariance in visual pattern recognition by pigeons and humans (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-11-19
    Description: Pigeons and humans chose which one of two alternative visual forms was identical to, or a mirror image of, a previously presented sample form. The two comparison forms were presented in various orientations with respect to the sample. The two species yielded similar accuracies, but although human reaction times depended linearly on the angular disparities, those of the pigeon did not. Humans appeared to apply a well-known, thoughtlike, mental rotation procedure to the problem, whereas pigeons seemed to rely on a more efficient automatic process that humans can use only in simpler rotational invariance tasks. Mirror-image forms may be better discriminated by the pigeon's visual system than by the human one.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hollard, V D -- Delius, J D -- New York, N.Y. -- Science. 1982 Nov 19;218(4574):804-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7134976" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Columbidae ; Discrimination (Psychology) ; Humans ; Rotation ; Species Specificity ; *Visual Perception
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  • 98
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    Rat pro-opiomelanocortin contains sulfate (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-07-02
    Description: Intermediate lobes isolated from rat pituitary glands incorporated [35S]sulfate into pro-opiomelanocortin and other adrenocorticotropic hormone-containing peptides. Incubation of intermediate lobes in medium containing the arginine analog canavanine inhibited the cleavage of pro-opiomelanocortin into smaller products. Pro-opiomelanocortin that accumulated in the presence of canavanine was also sulfated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoshina, H -- Hortin, G -- Boime, I -- New York, N.Y. -- Science. 1982 Jul 2;217(4554):63-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6283633" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/*biosynthesis ; Amino Acid Sequence ; Animals ; In Vitro Techniques ; Kinetics ; Leucine ; Pituitary Gland/*metabolism ; Pituitary Hormones, Anterior/*biosynthesis ; Pro-Opiomelanocortin ; Protein Precursors/*biosynthesis ; Radioisotope Dilution Technique ; Rats ; Sulfur Radioisotopes ; Sulfuric Acids/*metabolism ; Tritium
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  • 99
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    Hydrolysis of nerve gas by squid-type diisopropyl phosphorofluoridate hydrolyzing enzyme on agarose resin (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-03-05
    Description: An enzyme purified from squid nerve that hydrolyzes the cholinesterase inhibitor diisopropyl phosphorofluoridate (DFP) has now been coupled to agarose beads. A column of this agarose-DFPase hydrolyzes the nerve gas 1,2,2-trimethylpropyl methylphosphonofluoridate (Soman). Although the more inhibitory of the four diastereoisomers of Soman are hydrolyzed least rapidly, a column of sufficient length will accomplish 95 percent hydrolysis whether measured by fluoride release or loss of cholinesterase-inhibiting power. The results suggest a means for detoxifying unwanted chemical warfare agents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoskin, F C -- Roush, A H -- ES-02116/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1982 Mar 5;215(4537):1255-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7058344" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Decapodiformes/*enzymology ; Enzymes, Immobilized ; Isoflurophate/*metabolism ; Kinetics ; Molecular Weight ; Organophosphorus Compounds/*metabolism ; Soman/*metabolism ; Stereoisomerism ; Substrate Specificity
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  • 100
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    Gene scanning with block mutations (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-07-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1982 Jul 30;217(4558):434-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6283636" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; DNA, Recombinant ; *Gene Expression Regulation ; Genes ; Genes, Regulator ; *Mutation ; RNA, Messenger ; Simplexvirus/genetics ; Thymidine Kinase/genetics ; *Transcription, Genetic
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