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  • Articles  (47)
  • Base Sequence  (26)
  • Cell Line  (20)
  • Chemistry
  • American Association for the Advancement of Science (AAAS)  (47)
  • 1980-1984  (47)
  • 1980  (47)
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  • Articles  (47)
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  • 1980-1984  (47)
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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-12
    Description: In the report by T. Kakunaga and J. D. Crow (25 July, p. 505), Fig. 1 on page 506 should have been printed as follows: [See figure in the PDF file]〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dayhoff, M O -- Schwartz, R M -- Chen, H R -- Hunt, L T -- Barker, W C -- Orcutt, B C -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1182.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403878" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; *Information Systems ; *Nucleic Acids
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-02-08
    Description: The distribution of active polyadenylate-messenger RNA sequences in fractionated chicken liver chromatin was examined. A portion of these active gene sequences is concentrated in a DNA fraction retained by tightly bound nonhistone chromosomal proteins, while the nonretained DNA fraction is substantially depleted of a portion of these sequences. These findings suggest that the tightly bound nonhistones are physically associated with a subset of active gene sequences.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gates, D M -- Bekhor, I -- New York, N.Y. -- Science. 1980 Feb 8;207(4431):661-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352280" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chickens ; Chromatin/ultrastructure ; Chromosomal Proteins, Non-Histone/*metabolism ; DNA/*metabolism ; *Genes ; Liver/*metabolism ; Nucleic Acid Hybridization ; Protein Binding ; RNA, Messenger/genetics ; Sodium Chloride
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  • 3
    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
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):887-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7001629" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Chemistry/history ; DNA/genetics ; DNA, Recombinant ; History, 20th Century ; Molecular Biology/*history ; *Nobel Prize
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  • 5
    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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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-08-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson-Rees, W A -- Flandermeyer, R R -- Daniels, D W -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):719-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394535" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Chromosome Banding ; HLA Antigens/analysis ; HeLa Cells/*cytology/immunology ; Humans ; Karyotyping ; Kidney/*cytology/immunology ; Metaphase
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  • 7
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    American Association for the Advancement of Science (AAAS)
    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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  • 8
    Publication Date: 1980-03-14
    Description: A 15.0-kilobase (kb) Eco RI DNA fragment from normal mouse Balb/c genomic DNA that contains sequences (sarc) homologous to the acquired cell sequences (src) of Moloney sarcoma virus (MSV) has been cloned in phage lambda. The sarc region (1.2 to 1.3 kb) of the 15.0-kb cell fragment is indistinguishable from the src region of two isolates of MSV as judged by heteroduplex and restriction endonuclease analyses. The cellular sequences flanking sarc show no homology to other MSV sequences. Whereas cloned subgenomic portions of MSV that contain src transformed NIH-3T3 cells in vitro, the cloned sarc fragment is inactive.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oskarsson, M -- McClements, W L -- Blair, D G -- Maizel, J V -- Vande Woude, G F -- New York, N.Y. -- Science. 1980 Mar 14;207(4436):1222-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6243788" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chromosome Mapping ; DNA Restriction Enzymes ; *Genes ; *Genes, Viral ; Mice ; Mice, Inbred BALB C/*genetics ; Moloney murine leukemia virus/*genetics ; Nucleic Acid Hybridization
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  • 9
    Publication Date: 1980-07-11
    Description: The human genes for growth hormone (GH), chorionic somatomammotropin (CSH), and a third growth hormone-like gene (GHL) have been located on chromosome 17 in humans. DNA fragments of 2.6, 2.8, and 9.5 kilobase pairs containing GH, CSH, and GHL, respectively, were identified in human genomic DNA, and a 7.5-kilobase DNA fragment related to growth hormone DNA sequences was found in mouse cells. In somatic hybrids of human and mouse cells containing reduced numbers of human chromosomes, but a normal complement of mouse chromosomes, the mouse, 7.5-kolobase DNA fragment was always present, whereas the 2.6-, 2.8-, and 9.5-kilobase human fragments were present only when human chromosome 17 was also present.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owerbach, D -- Rutter, W J -- Martial, J A -- Baxter, J D -- Shows, T B -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):289-92.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384802" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Line ; *Chromosomes, Human, 16-18 ; *DNA/metabolism ; *Genes ; Growth Hormone/*biosynthesis ; Humans ; Hybrid Cells/metabolism ; Mice ; Placental Lactogen/*biosynthesis ; Translocation, Genetic
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-08-08
    Description: The growth of the MCF-7 human breast cancer cell line is unresponsive to the presence of estrogen in culture media. Paradoxically, in nude mice, growth of these cells and formation of solid tumors are dependent on estrogen. Tumors fail to develop in ovariectomized mice, but do develop in intact mice and in ovariectomized mice given estrogen. Primary cultures derived from MCF-7 tumors revert to unresponsiveness to estrogen. However, when these cultures are again transplanted into nude mice, estrogen is required for tumor formation. The continuous culture, the solid tumor, and the primary cultures therefrom have similar estrogen-binding capacities and affinities. These results indicate that mammary carcinoma cell growth in vivo is subject to inhibition that can be overcome by estrogen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shafie, S M -- New York, N.Y. -- Science. 1980 Aug 8;209(4457):701-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6994231" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Breast Neoplasms/metabolism/*physiopathology ; Castration ; Cell Division/drug effects ; Cell Line ; Cytosol/metabolism ; Estradiol/metabolism/*pharmacology ; Female ; Humans ; Insulin/pharmacology ; Mice ; Mice, Nude ; Neoplasm Transplantation ; Receptors, Estrogen/metabolism ; Transplantation, Heterologous
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  • 11
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-19
    Description: Two unstable mutations at the his4 locus of yeast are due to the insertion of the transposable elements Ty912 and Ty917 into the his4 regulatory region. The two transposons are related, one being derived from the other by a substitution of 4000 base pairs of DNA. Element Ty912 includes identical terminal repeats, whereas the terminal repeats of Ty917 are not identical. Transposition of Ty912 or Ty917 generates 5-base-pair duplications of the target DNA at either end of the element. Expression and reversion of a his4 gene containing Ty912 or Ty917 is controlled by three unlinked regulatory genes. The properties of these regulatory genes are similar to those described for the controlling elements in maize.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roeder, G S -- Farabaugh, P J -- Chaleff, D T -- Fink, G R -- CA23441/CA/NCI NIH HHS/ -- GM07617/GM/NIGMS NIH HHS/ -- GM15408/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1375-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251544" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Base Sequence ; Cloning, Molecular/methods ; *DNA Transposable Elements ; DNA, Fungal/genetics ; Genes, Regulator ; Genetic Linkage ; Histidine/*genetics ; Saccharomyces cerevisiae/*genetics ; Suppression, Genetic
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  • 12
    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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  • 13
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    American Association for the Advancement of Science (AAAS)
    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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  • 14
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-02-08
    Description: Regulation of hemoglobin synthesis depends in part on the population of cells available for erythroid differentiation. Mouse erythroleukemia cells were cloned, and the clones were induced with dimethyl sulfoxide to test the relative induction of beta minor and beta major synthesis. Cells of line 745 produced approximately 35 percent beta minor after induction, and 39 clones of line 745 produced from 23 to 61 percent beta minor. Further subcloning of the clone that produced 61 percent beta minor led to three subclones, all of which produced more than 90 percent beta minor. Thus one kind of hemoglobin regulation occurs at the cellular level.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alter, B P -- Goff, S C -- New York, N.Y. -- Science. 1980 Feb 8;207(4431):647-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6928071" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Line ; Clone Cells/metabolism ; Dimethyl Sulfoxide/pharmacology ; Globins/*biosynthesis/genetics ; Leukemia, Erythroblastic, Acute/metabolism ; Mice
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  • 15
    Publication Date: 1980-07-11
    Description: When mammalian cell cultures are exposed for 2 hours to (+/-)-7 beta, 8 alpha-dihydroxy-9 alpha, 10 alpha-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene, a mutagenic and carcinogenic derivative of benzo[a]pyrene, the extent of covalent modificationof mitochondrial DNA is 40 to 90 times greater than that of nuclear DNA. Evidence is presented that this reflects the lipophilic character of the derivative and the very high ratio of lipid to DNA in mitochondria. These results suggest that mitochondrial DNA may be an important cellular target of chemical carcinogens.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Backer, J M -- Weinstein, I B -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):297-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6770466" target="_blank"〉PubMed〈/a〉
    Keywords: 7,8-Dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide ; Animals ; Benzopyrenes/*metabolism ; Cell Line ; Cell Nucleus/metabolism ; DNA Replication/drug effects ; DNA, Mitochondrial/*metabolism ; Embryo, Mammalian ; Embryo, Nonmammalian ; L Cells (Cell Line) ; Liposomes
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  • 16
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-12-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Broad, W J -- New York, N.Y. -- Science. 1980 Dec 12;210(4475):1229-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434022" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Cell Survival/radiation effects ; Cell Transformation, Neoplastic/radiation effects ; Dose-Response Relationship, Radiation ; Gamma Rays ; Humans ; Neoplasms, Radiation-Induced/*etiology
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  • 17
    Publication Date: 1980-01-04
    Description: In concentrates of water produced in a laboratory simulation of a drinking water treatment process, direct-acting, nonvolatile mutagens were readily detected by means of the Ames Salmonella test. The mutagens were shown to be produced by the chlorination process. Treatment of the water with chloramine resulted in less mutagenic activity than treatment with free chlorine. Dechlorination of drinking water with sulfite sharply reduced the mutagenic activity. Treatment with sulfur dioxide is proposed as an effective, inexpensive method of reducing the direct-acting mutagenic activity of drinking water and of aqueous industrial effluents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheh, A M -- Skochdopole, J -- Koski, P -- Cole, L -- New York, N.Y. -- Science. 1980 Jan 4;207(4426):90-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6985746" target="_blank"〉PubMed〈/a〉
    Keywords: Chemical Phenomena ; Chemistry ; Chloramines ; Chlorine ; Mutagens/*analysis ; Salmonella typhimurium/genetics ; Sulfites ; Water Pollutants/*analysis ; Water Pollutants, Chemical/*analysis ; Water Supply/*analysis
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  • 18
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-04-11
    Description: Epimastigotes, the invertebrate host stage of Trypanosoma cruzi, the protozoan parasite causing Chagas' disease in man, were fused with vertebrate cells by using polyethylene glycol. Hybrid cells were selected on the basis of T. cruzi DNA complementation of biochemical deficiencies in the vertebrate cells. Some clones of the hybrid cells expressed T. cruzi-specific antigen. It might be possible to use selected antigens obtained from the hybrids as vaccines for immunodiagnosis or for elucidation of the pathogenesis of Chagas' disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Crane, M S -- Dvorak, J A -- New York, N.Y. -- Science. 1980 Apr 11;208(4440):194-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6987737" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigens/isolation & purification ; *Cell Fusion ; Cell Line ; Clone Cells ; Hybrid Cells/*immunology ; Hybridization, Genetic ; Mammals ; Polyethylene Glycols ; Trypanosoma cruzi/genetics/*immunology
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  • 19
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-19
    Description: Chemically synthesized DNA has been used in many recombinant DNA studies. These uses have included the total synthesis and cloning of functional genes, the cloning and expression of natural genes, and editing of changing genes by directed mutation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Itakura, K -- Riggs, A D -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1401-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6106285" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cloning, Molecular/*methods ; DNA/*chemical synthesis ; DNA Restriction Enzymes ; *DNA, Recombinant ; *Genes ; *Genes, Synthetic ; Insulin/genetics ; Mutation ; Nucleic Acid Hybridization ; Oligodeoxyribonucleotides/chemical synthesis ; Somatostatin/genetics
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  • 20
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    American Association for the Advancement of Science (AAAS)
    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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  • 21
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    American Association for the Advancement of Science (AAAS)
    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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  • 22
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    American Association for the Advancement of Science (AAAS)
    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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  • 23
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-19
    Description: Immunoglobulin class switching involves specific DNA rearrangements of the gene segments coding for heavy chain constant regions (CH) during B lymphocyte differentiation. In two different cases of C mu to C alpha switching examined here (T15 and M603) and one taken from the literature (MC101), three different sites on the 5' side of C mu and three different sites on the 5' side of C alpha are joined together in the process of CH switching. The sequences surrounding the three germ-line C alpha sites of recombination are highly conserved blocks of 30 nucleotides that may serve as recognition sequences for CH switching to the C alpha gene. This putative recognition sequence is repeated 17 times in approximately 1400 nucleotides of the germ-line Calpha 5' flanking sequence. The lack of homology between this C alpha sequence and sequences reported for the C gamma 1 and C gamma 2b switch sites suggests that heavy chain switching is mediated by class-specific recognition sequences and, presumably, class-specific regulatory mechanisms. In addition, it appears that in one example (MC101) CH switching progressed from C mu to C alpha to C gamma 1. This switching pathway may present difficulties for the simple deletional model of CH switching.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, M M -- Kim, S K -- Hood, L E -- AI 09072/AI/NIAID NIH HHS/ -- GM 07616/GM/NIGMS NIH HHS/ -- PCM76-81546/PC/NCI NIH HHS/ -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1360-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6774415" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*immunology ; Base Sequence ; DNA/genetics ; *Genes ; Immunoglobulin Constant Regions/*genetics ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin Variable Region/genetics ; Immunoglobulin alpha-Chains/*genetics ; Immunoglobulin mu-Chains/*genetics ; Immunoglobulins/*genetics ; Mice ; Myeloma Proteins/genetics ; Recombination, Genetic
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  • 24
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-02-15
    Description: Asymmetric membrane junctions were formed in culture by pairing two cell types which, in their respective homologous junctions, have cell-cell channels of different permselectivities. The channels in the asymmetric junction, presumably made of unequal channel precursors, displayed directional permselectivity; fluorescent labeled glutamic acid (700 daltons), but not smaller and less polar permeant molecules, traversed the junction more readily in one direction than in the other. The favored direction was the one where the permeant passed first through the cell membrane that would have the less restrictive channels in a homologous junction. This directional selectivity requires no electric field across the junction and is thus distinct from a rectifying junction. The physiological potential of such directional molecular sieving for partitioning communication between tissue cells of different function and developmental fate are discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flagg-Newton, J L -- Loewenstein, W R -- New York, N.Y. -- Science. 1980 Feb 15;207(4432):771-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352287" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; *Cell Communication ; Cell Line ; Cell Membrane Permeability ; Fluorescent Dyes ; Intercellular Junctions/*physiology ; Ion Channels/*physiology/ultrastructure ; Membrane Potentials ; Mice
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  • 25
    Publication Date: 1980-10-01
    Description: Incubation of astrocytoma cells with catecholamines results in a decrease in catecholamine-stimulated adenylate cyclase activity and a concomitant alteration in the sedimentation properties of particulate beta-adrenergic receptors. The altered receptors exhibit agonist binding properties similar to those of receptors that are "uncoupled" from adenylate cyclase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harden, T K -- Cotton, C U -- Waldo, G L -- Lutton, J K -- Perkins, J P -- GM 25163/GM/NIGMS NIH HHS/ -- HL 22490/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct;210(4468):441-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6254143" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/metabolism ; Astrocytoma ; Cell Line ; Centrifugation, Density Gradient ; Concanavalin A/pharmacology ; Endocytosis ; Humans ; Isoproterenol/*metabolism ; Protein Conformation ; Receptors, Adrenergic/*metabolism ; Receptors, Adrenergic, beta/*metabolism ; Time Factors
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  • 26
    Publication Date: 1980-07-25
    Description: Particles (less than or equal to 5 micrometers) of the potent carcinogen crystalline nickel subsulfide were actively phagocytized by cultures of Syrian hamster embryo cells and Chinese hamster ovary cells. Cells did not take up significant quantities of similar-sized particles of the noncarcinogen amorphous nickel monosulfide. The carcinogenic activity of this and other metal compounds appears to be proportional to their cellular uptake.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Costa, M -- Mollenhauer, H H -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):515-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394519" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; *Carcinogens ; Cell Line ; Cricetinae ; Cricetulus ; Drug Evaluation, Preclinical/methods ; Embryo, Mammalian ; Female ; Mesocricetus ; Nickel/*metabolism/toxicity ; Ovary ; Sulfides/metabolism/toxicity
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  • 27
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-07-25
    Description: Six variant clones isolated from a subclone of BALB/3T3-A31 clone were classified into three groups according to their different susceptibilities to cell transformation by ultraviolet light irradiation: highly susceptible, intermediately susceptible, and resistant. All variant clones showed similar susceptibility to cytotoxic effects induced by ultraviolet light.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kakunaga, T -- Crow, J D -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):505-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394516" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Transformation, Neoplastic/*radiation effects ; Clone Cells ; Dose-Response Relationship, Radiation ; Genetic Variation ; Mice ; Transformation, Genetic/*radiation effects ; *Ultraviolet Rays
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  • 28
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-10-17
    Description: In the report by John C. Behrendt et al. "Aeromagnetic and radio echo ice-sounding measurements show much greater area of the Dufek Intrusion, Antarctica" (29 Aug., p. 1014), the word "expedition" should have read "exploitation" in line 13 of the first paragraph on page 1014. Also, in line 2 of the next to last paragraph on page 1016, "50 to 60 cm/sec(2)" should have read "50 to 60 (cm sec(2)) x 10(-3)."〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koprowski, H -- Croce, C -- New York, N.Y. -- Science. 1980 Oct 17;210(4467):248.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423184" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antibodies ; Antibodies, Viral ; Cell Line ; *Clone Cells ; Mice ; *Patents as Topic ; Plasmacytoma/immunology
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  • 29
    Publication Date: 1980-07-11
    Description: Both hybrids of mouse and human microcells and whole cell hybrids generated by the fusion of primary mouse cells and SV40-transformed human fibroblasts were used to establish the syntenic association of the murine cytoplasmic superoxide dismutase and the interferon sensitivity genes on mouse chromosome 16. This assignment adds two new markers to chromosome 16 and provides another example of an evolutionarily conserved linkage. This finding also provides an animal model both for cellular responsiveness to interferon and for Down's syndrome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, P F -- Slate, D L -- Lawyer, F C -- Ruddle, F H -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):285-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6155698" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Transformation, Viral ; *Chromosomes, Human, 16-18 ; *Genes ; Humans ; Hybrid Cells/drug effects/*physiology ; Interferons/*pharmacology ; Karyotyping ; Mice ; Simian virus 40 ; Superoxide Dismutase/*genetics
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  • 30
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-01-11
    Description: The measure of time was used as an additional parameter on an existing flow cytometer to study the kinetics of enzyme activities and cell-stain interactions. By correlating all fluorescent signals from single cells with time, the dynamics of a reaction can be followed for several minutes. This advanced application of flow cytometry is easily implemented and can be incorporated into any flow cytometer that has two-parameter analysis capability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, J C -- Swartzendruber, D E -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):199-201.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6153131" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cells, Cultured/enzymology ; Computers ; Cricetinae ; *Cytological Techniques ; DNA/metabolism ; Esterases/metabolism ; Kinetics ; Mice ; Spectrometry, Fluorescence/methods ; Staining and Labeling
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  • 31
    Publication Date: 1980-09-19
    Description: The alpha-like and beta-like subunits of human hemoglobin are encoded by a small family of genes that are differentially expressed during development. Through the use of molecular cloning procedures, each member of this gene family has been isolated and extensively characterized. Although the alpha-like and beta-like globin genes are located on different chromosomes, both sets of genes are arranged in closely linked clusters. In both clusters, each of the genes is transcribed from the same DNA strand, and the genes are arranged in the order of their expressions during development. Structural comparisons of immediately adjacent genes within each cluster have provided evidence for the occurrence of gene duplication and correction during evolution and have led to the discovery of pseudogenes, genes that have acquired numerous mutations that prevent their normal expression. Recently, in vivo and in vitro systems for studying the expression of cloned eukaryotic genes have been developed as a means of identifying DNA sequences that are necessary for normal gene function. This article describes the application of an in vitro transcription procedure to the study of human globin gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Proudfoot, N J -- Shander, M H -- Manley, J L -- Gefter, M L -- Maniatis, T -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1329-36.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6158093" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell-Free System ; Fetal Hemoglobin/genetics ; *Genes ; Genes, Regulator ; Genetic Linkage ; Globins/*genetics ; Hemoglobins/*genetics ; Humans ; Operon ; RNA Caps ; RNA Polymerase II/metabolism ; *Transcription, Genetic
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  • 32
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-19
    Description: The sequence of a human leukocyte-derived complementary DNA (cDNA), Hif-2h, which directs the formation in Escherichia coli of a polypeptide, IFN-alpha 1, with interferon (IFN) activity has been described. A second IFN cDNA, Hif-SN206, which also elicits synthesis of a biologically active IFN, IFN-alpha 2, is described in this article. Whereas IFN-alpha 2 is twice as active on human as on bovine cells, IFN-alpha 1 is 10 to 20 times more active on bovine than on human cells. As deduced from the cDNA's, the messenger RNA's for the two IFN's differ in length and in 20 percent of the nucleotides; the mature IFN polypeptides differ in 17 percent of the amino acids. Both IFN-alpha 1 and IFN-alpha 2 differ from the lymphoblastoid IFN described by others. Therefore, at least three different IFN-alpha genes are expressed in man; studies on genomic DNA reveal the presence of at least eight IFN-related genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Streuli, M -- Nagata, S -- Weissmann, C -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1343-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6158094" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; DNA, Recombinant ; Escherichia coli/genetics ; Genes ; Humans ; *Interferons/genetics ; Leukocytes ; Lymphocytes ; Mice ; RNA, Messenger/genetics ; Structure-Activity Relationship
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  • 33
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wade, N -- New York, N.Y. -- Science. 1980 Sep 26;209(4464):1492-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6159679" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Drug Industry ; Humans ; Interferons/biosynthesis/*genetics ; *Jurisprudence ; Leukemia, Myeloid, Acute/pathology ; Universities
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  • 34
    Publication Date: 1980-12-19
    Description: Platelet-derived growth factor does not compete with epidermal growth factor (EGF) for binding to EGF receptors on the murine 3T3 cell surface, but it modulates EGF receptors in two ways: (i) it induces a transient down regulation of EGF receptors and (ii) it inhibits EGF-induced down regulation of EGF receptors. These data suggest a common cellular internalization mechanism for the receptors for both hormones.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wrann, M -- Fox, C F -- Ross, R -- AM-25826/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1980 Dec 19;210(4476):1363-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6254158" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding, Competitive ; Blood Platelets/*physiology ; Cell Line ; Endocytosis ; Epidermal Growth Factor/*metabolism ; Growth Substances/*pharmacology ; Mice ; Peptides/*metabolism/*pharmacology ; Platelet-Derived Growth Factor ; Receptor, Epidermal Growth Factor ; Receptors, Cell Surface/*drug effects/metabolism
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  • 35
    Publication Date: 1980-10-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bumb, R R -- Crummett, W B -- Cutie, S S -- Gledhill, J R -- Hummel, R H -- Kagel, R O -- Lamparski, L L -- Luoma, E V -- Miller, D L -- Nestrick, T J -- Shadoff, L A -- Stehl, R H -- Woods, J S -- New York, N.Y. -- Science. 1980 Oct;210(4468):385-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6159682" target="_blank"〉PubMed〈/a〉
    Keywords: Air Pollutants/analysis ; Chemical Phenomena ; Chemistry ; Chromatography, High Pressure Liquid ; *Dioxins/analysis ; *Fires ; Power Plants ; Smoke/analysis ; Soil Pollutants/analysis ; Tetrachlorodibenzodioxin/analysis ; Vehicle Emissions/analysis ; Water Pollutants, Chemical/analysis
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  • 36
    Publication Date: 1980-08-15
    Description: Selenium, administered to mice with Ehrlich ascites tumors, effectively limited tumor growth. The response was dependent on the chemical form and dose of selenium administered. At the doses administered, there were no detectable adverse effects to the host.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greeder, G A -- Milner, J A -- New York, N.Y. -- Science. 1980 Aug 15;209(4458):825-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7406957" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carcinoma, Ehrlich Tumor/*drug therapy/pathology ; Cell Line ; Cell Membrane Permeability ; Cystine/analogs & derivatives ; Dose-Response Relationship, Drug ; Male ; Mice ; Neoplasm Transplantation ; Selenium/*administration & dosage/metabolism/therapeutic use ; Selenomethionine/administration & dosage
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  • 37
    Publication Date: 1980-09-19
    Description: In vitro genetic techniques were used to study the sequence requirements for the initiation of specific transcription. Deletion mutants were constructed around the putative promoter of the adenovirus-2 major late and chicken conalbumin genes. Specific transcription in vitro by RNA polymerase B together with a HeLa cell cytoplasmic extract was used as the test for promoter function. With this approach sequences which are essential for the initiation of specific transcription in vitro, were shown to be located between 12 and 32 base pairs upstream from the 5' end of these genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corden, J -- Wasylyk, B -- Buchwalder, A -- Sassone-Corsi, P -- Kedinger, C -- Chambon, P -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1406-14.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251548" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; *Cell Physiological Phenomena ; DNA/genetics ; DNA Restriction Enzymes ; DNA, Recombinant ; DNA-Directed RNA Polymerases/*metabolism ; Eukaryotic Cells/*physiology ; *Operon ; RNA Polymerase II/*metabolism ; RNA, Messenger/genetics ; *Transcription, Genetic
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  • 38
    Publication Date: 1980-08-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haseltine, W A -- Lo, K M -- D'Andrea, A D -- New York, N.Y. -- Science. 1980 Aug 22;209(4459):929-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403858" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Benzopyrenes/*pharmacology ; Carcinogens ; *DNA, Bacterial ; Dose-Response Relationship, Drug ; Epoxy Compounds ; Hydrolysis ; Lac Operon ; Mutagens ; Stereoisomerism ; Structure-Activity Relationship
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  • 39
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-28
    Description: Half of the nucleotide substitutions during the evolutionary divergence of genes in animals, bacteria, and viruses are silent changes. These result from an inherent biochemical property of DNA and are fixed by genetic drift. Evolution may be viewed as a device for protecting DNA molecules from extinction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jukes, T H -- New York, N.Y. -- Science. 1980 Nov 28;210(4473):973-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434017" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Biological Evolution ; Codon ; DNA/*genetics ; DNA, Viral/genetics ; *Genes ; Genetic Code ; Globins/genetics ; Histones/genetics ; Mutation ; RNA, Messenger/genetics
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  • 40
    Publication Date: 1980-07-25
    Description: Analysis of the cell culture fluid from two new human hepatoma-derived cell lines reveals that 17 of the major human plasma proteins are synthesized and secreted by these cells. One of these cell lines, Hep 3B, also produces the two major polypeptides of the hepatitis B virus surface antigen. When Hep 3B in injected into athymic mice, metastatic hepatocellular carcinomas appear. These cell lines provide experimental models for investigation of plasma protein biosynthesis and the relation of the hepatitis B viru genome to tumorigenicity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knowles, B B -- Howe, C C -- Aden, D P -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):497-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6248960" target="_blank"〉PubMed〈/a〉
    Keywords: Blood Proteins/*secretion ; Carcinoma, Hepatocellular/immunology/*secretion ; Cell Line ; Electrophoresis, Polyacrylamide Gel ; Hepatitis B Surface Antigens/*analysis ; Humans ; Immunodiffusion ; Liver Neoplasms/immunology/*secretion
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  • 41
    Publication Date: 1980-09-19
    Description: Structural and functional analysis of the mouse alpha-globin and beta-globin genes reveals that the globin genes are encoded in discontinous bits of coding information and that each gene locus is much more complex than was originally supposed. Each seems to consist of an array of several authentic genes as well as several apparently inactive pseudogenes. Comparison of the sequences of some of these genes to one another indicates that chromosomal DNA is a dynamic structure. Flanking and intervening sequences change in two ways: quickly, by duplication and extensive insertions and deletions, and slowly, by point mutation. Active coding sequences are usually limited to the slower mode of evolution. In addition to identifying fast and slow modes of evolution, it has also been possible to test the function of several signals that surround these genes and to identify those that appear to play a role in gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leder, P -- Hansen, J N -- Konkel, D -- Leder, A -- Nishioka, Y -- Talkington, C -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1336-42.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414319" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Biological Evolution ; Genes ; Globins/*genetics ; Mice ; Nucleic Acid Hybridization ; Nucleic Acid Precursors/genetics ; RNA, Messenger/genetics/metabolism
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 42
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-04-04
    Description: Recombinant bacterial plasmids that contain DNA complementary to human preproinsulin messenger RNA have been constructed. One clone contains the entire preproinsulin coding region, as well as the 3' untranslated region of the messenger RNA and eight nucleotides of the 5' untranslated region. Additional sequence information for the 5' untranslated region was obtained with the use of insulinoma messenger RNA in conjunction with specific primers from the cloned DNA for enzymatic chain termination sequence analysis. The results confirm the amino acid sequence of human proinsulin previously determined, and predict the amino acid sequence of the human preproinsulin signal peptide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sures, I -- Goeddel, D V -- Gray, A -- Ullrich, A -- New York, N.Y. -- Science. 1980 Apr 4;208(4439):57-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6927840" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Cloning, Molecular ; DNA, Recombinant ; Humans ; Insulin ; Nucleic Acid Hybridization ; Nucleotides/*genetics ; Proinsulin/*genetics ; Protein Precursors/*genetics ; RNA, Messenger/*genetics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 43
    Publication Date: 1980-09-19
    Description: The molecular structure of a mouse immunoglobulin D from a plasmacytoma tumor and that of the normal mouse gene coding for immunoglobulin D are presented. The DNA sequence results indicate an unusual structure for the tumor delta chain in two respects: (i) Only two constant (C) region domains, termed C delta 1 and C delta 3 by homology considerations, are found; the two domains are separated by an unusual hinge region C delta H that lacks cysteine residues and thus cannot provide the covalent cross-links between heavy chains typically seen in immunoglobulins. The two domains and hinge are all coded on separate exons. (ii) At the carboxyl end of the delta chain there is a stretch of 26 amino acids that is coded from an exon located 2750 to 4600 base pairs downstream from the rest of the gene. Analogy with immunoglobulin M suggests that this distally coded segment C delta DC may have a membrane-binding function; however, it is only moderately hydrophobic. A fifth potential exon (C delta AC), located adjacent to the 3' (carboxyl) end of C delta 3, could code for a stretch of 49 amino acids. The tumor's expression of the delta gene may be aberrant, but the simplest interpretation would be that this tumor expresses one of the several biologically significant forms of the delta chain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tucker, P W -- Liu, C P -- Mushinski, J F -- Blattner, F R -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1353-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6968091" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; B-Lymphocytes/*immunology ; Base Sequence ; *Genes ; Glycoproteins/genetics ; Immunoglobulin Constant Regions/genetics ; Immunoglobulin D/*genetics ; Mice ; Myeloma Proteins/genetics ; RNA, Messenger/*genetics ; Receptors, Antigen, B-Cell/genetics ; Structure-Activity Relationship
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 44
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-19
    Description: Yeast transformation can be used to insert new sequence arrangements into a variety of chromosomal locations by homologous recombination. These newly inserted sequences can recombine with similar sequences located on other chromosomes. In these events, information is duplicated without being lost at the site from which it is derived. Similar mechanisms might be utilized by cells to provide new functions during development or differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scherer, S -- Davis, R W -- GM21891/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1380-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251545" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Chromosome Deletion ; Chromosomes/ultrastructure ; *DNA Transposable Elements ; DNA, Fungal/*genetics ; Gene Conversion ; Histidine/genetics ; *Recombination, Genetic ; Saccharomyces cerevisiae/*genetics ; Transformation, Genetic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 45
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-08-29
    Description: Prostaglandins of the A series strongly inhibit the production of Sendai virus in African green monkey kidney cells and are able to prevent the establishment of persistent infection ("carrier" state). This action is specific for prostaglandin A and is not due to alteration in the host cell metabolism or in the virus infectivity. The possibility that this effect is mediated by interferon is discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Santoro, M G -- Benedetto, A -- Carruba, G -- Garaci, E -- Jaffe, B M -- New York, N.Y. -- Science. 1980 Aug 29;209(4460):1032-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6157190" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arachidonic Acids/pharmacology ; Cell Line ; Dose-Response Relationship, Drug ; Haplorhini ; Interferons/pharmacology ; Parainfluenza Virus 1, Human/*drug effects ; Prostaglandins/pharmacology ; Prostaglandins A/*pharmacology ; Structure-Activity Relationship ; Thromboxanes/pharmacology ; Virus Replication/*drug effects
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 46
    Publication Date: 1980-09-19
    Description: Crown gall tumors are induced in plants by infection with the soil bacterium Agrobacterium tumefaciens. Because the tumor induction involves transfer of a portion of the tumor-inducing (Ti) plasmid DNA from the bacterium to the plant cells, this system is of interest for the study of genetic exchange as well as tumor induction. The boundaries of the transferred DNA (T-DNA) have been cloned from transformed plant cells of tobacco. Detailed mapping with restriction enzymes and nucleotide sequence analysis of two independent clones were used to study the molecular structure of the ends of the T-DNA. One clone contains the two ends of the T-DNA joined together; the other contains one end of the T-DNA joined to repetitive plant DNA sequences. These studies provide direct evidence that the T-DNA can be integrated into the plant genome. In addition, the data suggest that in the plant, T-DNA can be tandemly repeated. Sequence analysis of the junction of crown gall clone 1 reveals several direct repeats as well as an inverted repeat; these structures may be involved in the transfer of the DNA from Agrobacterium to plant cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zambryski, P -- Holsters, M -- Kruger, K -- Depicker, A -- Schell, J -- Van Montagu, M -- Goodman, H M -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1385-91.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251546" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cloning, Molecular/methods ; DNA Restriction Enzymes/metabolism ; DNA, Neoplasm/*genetics ; DNA, Recombinant ; Plant Tumors/*microbiology ; Plants, Toxic ; *Plasmids ; Recombination, Genetic ; Rhizobium/*genetics ; Tobacco ; Transformation, Genetic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 47
    Publication Date: 1980-02-01
    Description: Homogeneous human lymphoblastoid interferon with an apparent molecular size of 18,500 daltons was characterized by its amino acid composition. Analysis of the amino terminal sequence by Edman degradation indicates that the sequence is unique.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zoon, K C -- Smith, M E -- Bridgen, P J -- Anfinsen, C B -- Hunkapiller, M W -- Hood, L E -- New York, N.Y. -- Science. 1980 Feb 1;207(4430):527-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352260" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acids/analysis ; Cell Line ; Humans ; *Interferons ; Lymphocytes/*analysis
    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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