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  • Animals  (119)
  • AERODYNAMICS
  • ASTRONOMY
  • Life and Medical Sciences
  • METEOROLOGY AND CLIMATOLOGY
  • American Association for the Advancement of Science (AAAS)  (119)
  • 1990-1994  (119)
  • 1980-1984
  • 1960-1964
  • 1994  (119)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (119)
  • Wiley-Blackwell  (126)
Years
  • 1990-1994  (119)
  • 1980-1984
  • 1960-1964
Year
  • 1
    Publication Date: 1994-09-02
    Description: As a step toward developing poliovirus as a vaccine vector, poliovirus recombinants were constructed by fusing exogenous peptides (up to 400 amino acids) and an artificial cleavage site for viral protease 3Cpro to the amino terminus of the viral polyprotein. Viral replication proceeded normally. An extended polyprotein was produced in infected cells and proteolytically processed into the complete array of viral proteins plus the foreign peptide, which was excluded from mature virions. The recombinants retained exogenous sequences through successive rounds of replication in culture and in vivo. Infection of animals with recombinants elicited a humoral immune response to the foreign peptides.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Andino, R -- Silvera, D -- Suggett, S D -- Achacoso, P L -- Miller, C J -- Baltimore, D -- Feinberg, M B -- AI22346/AI/NIAID NIH HHS/ -- AI35545/AI/NIAID NIH HHS/ -- RR00169/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1994 Sep 2;265(5177):1448-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, University of California, San Francisco.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8073288" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibodies, Bacterial/biosynthesis ; Antibodies, Viral/biosynthesis ; Antigens, Bacterial/genetics/immunology ; Antigens, Viral/genetics/immunology ; Base Sequence ; Cloning, Molecular ; *Genetic Engineering ; Genetic Vectors ; HeLa Cells ; Humans ; Macaca fascicularis ; Mice ; Mice, Transgenic ; Molecular Sequence Data ; Poliovirus/*genetics/immunology/physiology ; Poliovirus Vaccine, Oral/*genetics ; *Protein Biosynthesis ; Proteins/metabolism ; Recombinant Proteins/biosynthesis/metabolism ; Vaccines, Synthetic/genetics/*immunology ; Virus Replication
    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
    Publication Date: 1994-06-24
    Description: Fossils and artifacts recovered from the middle Awash Valley of Ethiopia's Afar depression sample the Middle Pleistocene transition from Homo erectus to Homo sapiens. Ar/Ar ages, biostratigraphy, and tephrachronology from this area indicate that the Pleistocene Bodo hominid cranium and newer specimens are approximately 0.6 million years old. Only Oldowan chopper and flake assemblages are present in the lower stratigraphic units, but Acheulean bifacial artifacts are consistently prevalent and widespread in directly overlying deposits. This technological transition is related to a shift in sedimentary regime, supporting the hypothesis that Middle Pleistocene Oldowan assemblages represent a behavioral facies of the Acheulean industrial complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clark, J D -- de Heinzelin, J -- Schick, K D -- Hart, W K -- White, T D -- WoldeGabriel, G -- Walter, R C -- Suwa, G -- Asfaw, B -- Vrba, E -- New York, N.Y. -- Science. 1994 Jun 24;264(5167):1907-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anthropology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8009220" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ethiopia ; *Fossils ; Geology/history ; History, Ancient ; Hominidae/*anatomy & histology ; Humans ; Skull/anatomy & histology
    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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  • 3
    Publication Date: 1994-11-11
    Description: The venom of the funnel-web spider Agelenopsis aperta contains several peptides that paralyze prey by blocking voltage-sensitive calcium channels. Two peptides, omega-Aga-IVB (IVB) and omega-Aga-IVC (IVC), have identical amino acid sequences, yet have opposite absolute configurations at serine 46. These toxins had similar selectivities for blocking voltage-sensitive calcium channel subtypes but different potencies for blocking P-type voltage-sensitive calcium channels in rat cerebellar Purkinje cells as well as calcium-45 influx into rat brain synaptosomes. An enzyme purified from venom converts IVC to IVB by isomerizing serine 46, which is present in the carboxyl-terminal tail, from the L to the D configuration. Unlike the carboxyl terminus of IVC, that of IVB was resistant to the major venom protease. These results show enzymatic activities in A. aperta venom being used in an unprecedented strategy for coproduction of necessary neurotoxins that possess enhanced stability and potency.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heck, S D -- Siok, C J -- Krapcho, K J -- Kelbaugh, P R -- Thadeio, P F -- Welch, M J -- Williams, R D -- Ganong, A H -- Kelly, M E -- Lanzetti, A J -- New York, N.Y. -- Science. 1994 Nov 11;266(5187):1065-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NPS Pharmaceuticals Incorporated, Salt Lake City, Utah 84108.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973665" target="_blank"〉PubMed〈/a〉
    Keywords: Agatoxins ; Amino Acid Sequence ; Animals ; Base Sequence ; Calcium/metabolism ; Calcium Channel Blockers/chemistry/*metabolism/toxicity ; Calcium Channels/*metabolism ; Isomerases/metabolism ; Molecular Sequence Data ; *Protein Processing, Post-Translational ; Purkinje Cells/metabolism ; Rats ; Serine/*metabolism ; Spider Venoms/chemistry/enzymology/*metabolism/toxicity ; Stereoisomerism ; Structure-Activity Relationship ; Synaptosomes/metabolism
    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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  • 4
    Publication Date: 1994-04-29
    Description: In a search for genes that regulate circadian rhythms in mammals, the progeny of mice treated with N-ethyl-N-nitrosourea (ENU) were screened for circadian clock mutations. A semidominant mutation, Clock, that lengthens circadian period and abolishes persistence of rhythmicity was identified. Clock segregated as a single gene that mapped to the midportion of mouse chromosome 5, a region syntenic to human chromosome 4. The power of ENU mutagenesis combined with the ability to clone murine genes by map position provides a generally applicable approach to study complex behavior in mammals.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3839659/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3839659/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vitaterna, M H -- King, D P -- Chang, A M -- Kornhauser, J M -- Lowrey, P L -- McDonald, J D -- Dove, W F -- Pinto, L H -- Turek, F W -- Takahashi, J S -- P30-CA07175/CA/NCI NIH HHS/ -- R01-DK40493/DK/NIDDK NIH HHS/ -- T32 NS071040/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- etc. -- New York, N.Y. -- Science. 1994 Apr 29;264(5159):719-25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology and Physiology, Northwestern University, Evanston, IL 60208.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8171325" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosome Mapping ; Chromosomes, Human, Pair 4 ; Circadian Rhythm/*genetics ; Ethylnitrosourea ; Female ; *Genes ; Genotype ; Humans ; Male ; Mice ; Mice, Inbred C57BL ; *Mutagenesis ; Phenotype
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 1994-09-16
    Description: The evolutionary origins of the protistan phylum, Myxozoa, have long been questioned. Although these obligate parasites are like protozoans in many features, several aspects of their ontogeny and morphology have implied a closer relationship to metazoan lineages. Phylogenetic analyses of 18S ribosomal RNA sequences from myxozoans and other eukaryotes, with the use of parsimony, distance, and maximum-likelihood methods, support the hypothesis that myxozoans are closely related to the bilateral animals. These results suggest that the Myxozoa, long considered an assemblage of protozoans, should be considered a metazoan phylum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smothers, J F -- von Dohlen, C D -- Smith, L H Jr -- Spall, R D -- New York, N.Y. -- Science. 1994 Sep 16;265(5179):1719-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Idaho State University, Pocatello 83209.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8085160" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Biological Evolution ; Eukaryota/*classification/genetics ; Likelihood Functions ; Molecular Sequence Data ; Parasites/*classification/genetics ; Phylogeny ; Probability ; RNA, Protozoan/genetics ; RNA, Ribosomal, 18S/*genetics
    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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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-06-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Messing, R B -- Gust, L D -- Petersen, D W -- New York, N.Y. -- Science. 1994 Jun 10;264(5165):1518-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8202700" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Carcinogenicity Tests ; Chloroform/administration & dosage/*toxicity ; Female ; Humans ; Kidney Neoplasms/*chemically induced ; Rats ; Risk Factors ; *Water Supply
    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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  • 7
    Publication Date: 1994-12-02
    Description: In many mammalian species, the placenta is the site of synthesis of proteins in the prolactin and growth hormone family. Analysis of two such proteins, proliferin (PLF) and proliferin-related protein (PRP), revealed that they are potent regulators of angiogenesis; PLF stimulated and PRP inhibited endothelial cell migration in cell culture and neovascularization in vivo. The mouse placenta secretes an angiogenic activity during the middle of pregnancy that corresponds primarily to PLF, but later in gestation releases a factor that inhibits angiogenesis, which was identified as PRP. Incubation of placental tissue with PLF led to the specific binding of this hormone to capillary endothelial cells. Thus PLF and PRP may regulate the initiation and then the cessation of placental neovascularization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jackson, D -- Volpert, O V -- Bouck, N -- Linzer, D I -- CA52750/CA/NCI NIH HHS/ -- HD24518/HD/NICHD NIH HHS/ -- HD29962/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1994 Dec 2;266(5190):1581-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Molecular Biology, and Cell Biology, Northwestern University, Evanston, IL 60208.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7527157" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; Cell Movement/drug effects ; Cornea/blood supply ; Culture Techniques ; Endothelium, Vascular/*cytology/drug effects/metabolism ; Female ; Fibroblast Growth Factor 2/pharmacology ; Glycoproteins/metabolism/*pharmacology ; Growth Substances/metabolism/*pharmacology ; Intercellular Signaling Peptides and Proteins ; *Neovascularization, Pathologic ; Placenta/*blood supply ; Pregnancy ; Pregnancy Proteins/*pharmacology ; Rats
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 1994-04-15
    Description: The first step in oral absorption of many medically important peptide-based drugs is mediated by an intestinal proton-dependent peptide transporter. This transporter facilitates the oral absorption of beta-lactam antibiotics and angiotensin-converting enzyme inhibitors from the intestine into enterocytes lining the luminal wall. A monoclonal antibody that blocked uptake of cephalexin was used to identify and clone a gene that encodes an approximately 92-kilodalton membrane protein that was associated with the acquisition of peptide transport activity by transport-deficient cells. The amino acid sequence deduced from the complementary DNA sequence of the cloned gene indicated that this transport-associated protein shares several conserved structural elements with the cadherin superfamily of calcium-dependent, cell-cell adhesion proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dantzig, A H -- Hoskins, J A -- Tabas, L B -- Bright, S -- Shepard, R L -- Jenkins, I L -- Duckworth, D C -- Sportsman, J R -- Mackensen, D -- Rosteck, P R Jr -- New York, N.Y. -- Science. 1994 Apr 15;264(5157):430-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8153632" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Transport ; CHO Cells ; Cadherins/*chemistry ; Carrier Proteins/*chemistry/genetics/isolation & purification/metabolism ; Cephalexin/*metabolism ; Cloning, Molecular ; Cricetinae ; Glycosylation ; Humans ; Hydrogen-Ion Concentration ; Intestinal Mucosa/*metabolism ; Leucine/analogs & derivatives/metabolism ; *Membrane Transport Proteins ; Mice ; Mice, Inbred A ; Molecular Sequence Data ; Open Reading Frames ; Sequence Homology, Amino Acid ; Transfection ; Tumor Cells, Cultured
    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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  • 9
    Publication Date: 1994-11-04
    Description: The therapeutic responsiveness of genetically defined tumors expressing or devoid of the p53 tumor suppressor gene was compared in immunocompromised mice. Tumors expressing the p53 gene contained a high proportion of apoptotic cells and typically regressed after treatment with gamma radiation or adriamycin. In contrast, p53-deficient tumors treated with the same regimens continued to enlarge and contained few apoptotic cells. Acquired mutations in p53 were associated with both treatment resistance and relapse in p53-expressing tumors. These results establish that defects in apoptosis, here caused by the inactivation of p53, can produce treatment-resistant tumors and suggest that p53 status may be an important determinant of tumor response to therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lowe, S W -- Bodis, S -- McClatchey, A -- Remington, L -- Ruley, H E -- Fisher, D E -- Housman, D E -- Jacks, T -- 5R27CA17575/CA/NCI NIH HHS/ -- CA14051/CA/NCI NIH HHS/ -- R01CA40602/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1994 Nov 4;266(5186):807-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cancer Research, Massachusetts Institute of Technology, Cambridge 02139.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973635" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Doxorubicin/*therapeutic use ; Drug Resistance ; Fibrosarcoma/drug therapy/*genetics/radiotherapy/*therapy ; *Gamma Rays ; *Genes, p53/genetics ; Immunocompromised Host ; Mice ; Mice, Nude ; Mutation ; Neoplasm Recurrence, Local ; Neoplasm Transplantation ; Radiation Tolerance
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 1994-02-04
    Description: The success of Mycobacterium species as pathogens depends on their ability to maintain an infection inside the phagocytic vacuole of the macrophage. Although the bacteria are reported to modulate maturation of their intracellular vacuoles, the nature of such modifications is unknown. In this study, vacuoles formed around Mycobacterium avium failed to acidify below pH 6.3 to 6.5. Immunoelectron microscopy of infected macrophages and immunoblotting of isolated phagosomes showed that Mycobacterium vacuoles acquire the lysosomal membrane protein LAMP-1, but not the vesicular proton-adenosine triphosphatase (ATPase) responsible for phagosomal acidification. This suggests either a selective inhibition of fusion with proton-ATPase-containing vesicles or a rapid removal of the complex from Mycobacterium phagosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sturgill-Koszycki, S -- Schlesinger, P H -- Chakraborty, P -- Haddix, P L -- Collins, H L -- Fok, A K -- Allen, R D -- Gluck, S L -- Heuser, J -- Russell, D G -- AI26889/AI/NIAID NIH HHS/ -- AI34207/AI/NIAID NIH HHS/ -- AR42370/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Feb 4;263(5147):678-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Microbiology, Washington University Medical Center, St. Louis, MO 63110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8303277" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigens, CD ; Hydrogen-Ion Concentration ; Leishmania mexicana/physiology ; Lysosome-Associated Membrane Glycoproteins ; Macrophages/metabolism/*microbiology/parasitology/ultrastructure ; Membrane Fusion ; Membrane Glycoproteins/metabolism ; Mice ; Microscopy, Immunoelectron ; Mycobacterium avium/*physiology ; Mycobacterium tuberculosis/physiology ; Phagosomes/metabolism/*microbiology/parasitology/ultrastructure ; Proton-Translocating ATPases/*metabolism ; Vacuoles/metabolism/microbiology/parasitology/ultrastructure
    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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