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  • Articles  (86)
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  • Base Sequence  (86)
  • 1985-1989  (86)
  • 1985  (86)
  • Natural Sciences in General  (86)
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  • Articles  (86)
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  • 1985-1989  (86)
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  • 1
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    Major glycoprotein antigens that induce antibodies in AIDS patients are encoded by HTLV-III (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-05-31
    Description: Antibodies from the serum of patients with the acquired immune deficiency syndrome (AIDS) or with the AIDS-related complex and from the serum of seropositive healthy homosexuals, recognize two major glycoproteins in cells infected with human T-cell lymphotropic virus type III (HTLV III). These glycoproteins, gp160 and gp120, are encoded by the 2.5-kilobase open reading frame located in the 3' end of the HTLV-III genome, as determined by amino terminus sequence analysis of the radiolabeled forms of these proteins. It is hypothesized that gp160 and gp120 represent the major species of virus-encoded envelope gene products for HTLV-III.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Allan, J S -- Coligan, J E -- Barin, F -- McLane, M F -- Sodroski, J G -- Rosen, C A -- Haseltine, W A -- Lee, T H -- Essex, M -- 2T32-CA09031/CA/NCI NIH HHS/ -- CA 13885/CA/NCI NIH HHS/ -- CA 37466/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 May 31;228(4703):1091-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2986290" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*immunology ; Amino Acid Sequence ; Antibodies, Viral/immunology ; Antigens, Viral/genetics/*immunology ; Base Sequence ; Deltaretrovirus/*immunology ; Genes, Viral ; Glycoproteins/genetics/immunology ; Humans ; Molecular Weight ; Tunicamycin/pharmacology ; Viral Envelope Proteins/genetics/*immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Expression in brain of a messenger RNA encoding a novel neuropeptide homologous to calcitonin gene-related peptide (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-09-13
    Description: As a consequence of alternative RNA processing events, a single rat gene can generate messenger RNA's (mRNA's) encoding either calcitonin or a neuropeptide referred to as alpha-type calcitonin gene-related peptide (alpha-CGRP). An mRNA product of a related gene has been identified in rat brain and thyroid encoding the protein precursor of a peptide differing from alpha-CGRP by only a single amino acid. The RNA encoding this peptide, which is referred to as beta-CGRP, appears to be the only mature transcript of the beta-CGRP gene. Hybridization histochemistry reveals a similar distribution of alpha- and beta-CGRP mRNA's, but their relative levels of expression vary in different cranial nerve nuclei. Thus beta-CGRP is a new member of a family of related genes with potential functions in regulating the transduction of sensory and motor information.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Amara, S G -- Arriza, J L -- Leff, S E -- Swanson, L W -- Evans, R M -- Rosenfeld, M G -- New York, N.Y. -- Science. 1985 Sep 13;229(4718):1094-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2994212" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Brain Chemistry ; Calcitonin Gene-Related Peptide ; DNA/analysis ; DNA Restriction Enzymes/metabolism ; Gene Expression Regulation ; Nerve Tissue Proteins/*genetics ; RNA, Messenger/*analysis ; Rats
    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
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    A catalytic RNA and its gene from Salmonella typhimurium (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-05-24
    Description: The gene for the RNA subunit (M1 RNA) of ribonuclease P from Salmonella typhimurium directs the synthesis of an RNA that can cleave transfer RNA precursor molecules. The mature M1 RNA coded for by Salmonella typhimurium is 375 nucleotides long and has six nucleotide changes in comparison to M1 RNA from Escherichia coli. The regions for promotion and termination of transcription are closely conserved, but adjacent regions of nucleotide sequences show considerable drift.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baer, M -- Altman, S -- GM19422/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 May 24;228(4702):999-1002.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2408335" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cloning, Molecular ; Endoribonucleases/*analysis ; Escherichia coli/enzymology/genetics ; *Escherichia coli Proteins ; Genes, Bacterial ; Nucleic Acid Conformation ; Nucleic Acid Precursors/genetics ; Promoter Regions, Genetic ; RNA/genetics ; RNA Precursors ; RNA, Bacterial/*genetics/metabolism ; Repetitive Sequences, Nucleic Acid ; Ribonuclease P ; Salmonella typhimurium/enzymology/*genetics ; Terminator Regions, Genetic ; Transcription, Genetic
    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
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    Trans-activator gene of human T-lymphotropic virus type III (HTLV-III) (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-07-05
    Description: Human T-lymphotropic virus type III (HTLV-III) encodes a trans-acting factor that activates the expression of genes linked to the HTLV-III long terminal repeat. By functional mapping of complementary DNA transcripts of viral messenger RNA's the major functional domain of the gene encoding this factor was localized to a region immediately before the env gene of the virus, a region previously thought to be noncoding. This newly identified gene consists of three exons, and its transcription into messenger RNA involves two splicing events bringing together sequences from the 5' part (287 base pairs), middle (268 base pairs), and 3'part (1258 base pairs) of the HTLV-III genome. A similar messenger RNA with a truncated second exon (70 base pairs) does not encode a trans-acting function. It is proposed that this second messenger RNA is the transcript of a gene (3'-orf) located after the env gene. Messenger RNA's were also identified for the env and gag-pol genes of HTLV-III.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arya, S K -- Guo, C -- Josephs, S F -- Wong-Staal, F -- New York, N.Y. -- Science. 1985 Jul 5;229(4708):69-73.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2990040" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Chromosome Mapping ; Deltaretrovirus/*genetics ; Gene Expression Regulation ; Genes, Regulator ; *Genes, Viral ; Humans ; RNA Splicing ; RNA, Messenger/genetics ; RNA, Viral/genetics ; Repetitive Sequences, Nucleic Acid ; Transcription Factors/*genetics ; Viral Proteins/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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  • 5
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    T-cell receptor beta-chain expression: dependence on relatively few variable region genes (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-08-09
    Description: Fifteen independently isolated complementary DNA clones that contain T-cell receptor (TCR) V beta genes were sequenced and found to represent 11 different V beta genes. When compared with known sequences, 14 different V beta genes could be defined from a total of 25 complementary DNA's; 11 clones therefore involved repeated usage of previously identified V beta's. Based on these data, we calculate a maximum likelihood estimate of the number of expressed germline V beta genes to be 18 with an upper 95 percent confidence bound of 30 genes. Southern blot analysis has shown that most of these genes belong to single element subfamilies which show very limited interstrain polymorphism. The TCR beta-chain diversity appears to be generated from a limited V beta gene pool primarily by extensive variability at the variable-diversity-joining (V-D-J) junctional site, with no evidence for the involvement of somatic hypermutation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Behlke, M A -- Spinella, D G -- Chou, H S -- Sha, W -- Hartl, D L -- Loh, D Y -- GM07200/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 Aug 9;229(4713):566-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3875151" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Base Sequence ; Chromosome Mapping ; Cloning, Molecular ; Dna ; Gene Pool ; *Genetic Variation ; Humans ; Hybridomas ; Immunoglobulin Variable Region/genetics ; Mice ; Mice, Inbred BALB C/genetics ; Mice, Inbred C57BL/genetics ; Mice, Inbred Strains/genetics ; Receptors, Antigen, T-Cell/*genetics ; Species Specificity ; Spleen ; T-Lymphocytes ; Thymus Gland
    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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    Genomic heterogeneity of AIDS retroviral isolates from North America and Zaire (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-11-22
    Description: In an analysis of the genomic variation of AIDS retroviral isolates from patients living in New York, Alabama, and Zaire, restriction maps were constructed by using seven enzymes, each known to cleave the proviral DNA more than once, in conjunction with Southern blot analysis. The maps of LAV, HTLV-III, and ARV-2 as deduced from their published nucleotide sequences were included in this analysis. The results demonstrated that (i) several "signature" restriction sites were common to all isolates; (ii) with the exception of LAV and HTLV-III, the North American and European isolates were all different from one another and showed no geographical specificity; (iii) the African isolates as a group were more diverse than those from North America and Europe; and (iv) the genomic variability was concentrated within the env gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Benn, S -- Rutledge, R -- Folks, T -- Gold, J -- Baker, L -- McCormick, J -- Feorino, P -- Piot, P -- Quinn, T -- Martin, M -- New York, N.Y. -- Science. 1985 Nov 22;230(4728):949-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2997922" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*microbiology ; Base Sequence ; Chromosome Mapping ; Cloning, Molecular ; DNA Restriction Enzymes ; DNA, Viral/genetics ; Deltaretrovirus/*genetics ; Democratic Republic of the Congo ; Genes, Viral ; Humans ; North America ; Viral Proteins/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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  • 7
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    The mosaic genome of warm-blooded vertebrates (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-05-24
    Description: Most of the nuclear genome of warm-blooded vertebrates is a mosaic of very long (much greater than 200 kilobases) DNA segments, the isochores; these isochores are fairly homogeneous in base composition and belong to a small number of major classes distinguished by differences in guanine-cytosine (GC) content. The families of DNA molecules derived from such classes can be separated and used to study the genome distribution of any sequence which can be probed. This approach has revealed (i) that the distribution of genes, integrated viral sequences, and interspersed repeats is highly nonuniform in the genome, and (ii) that the base composition and ratio of CpG to GpC in both coding and noncoding sequences, as well as codon usage, mainly depend on the GC content of the isochores harboring the sequences. The compositional compartmentalization of the genome of warm-blooded vertebrates is discussed with respect to its evolutionary origin, its causes, and its effects on chromosome structure and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bernardi, G -- Olofsson, B -- Filipski, J -- Zerial, M -- Salinas, J -- Cuny, G -- Meunier-Rotival, M -- Rodier, F -- New York, N.Y. -- Science. 1985 May 24;228(4702):953-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/4001930" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Composition ; Base Sequence ; Biological Evolution ; Centrifugation, Density Gradient ; Chickens/*genetics ; Chromosome Banding ; Codon ; Cytosine/analysis ; DNA/analysis/*genetics ; DNA Replication ; DNA, Viral/genetics ; Gene Amplification ; *Genes ; Genes, Viral ; Guanine/analysis ; Humans ; Mammals/*genetics ; Mice/genetics ; Mutation ; Rabbits/genetics ; Recombination, Genetic ; Repetitive Sequences, Nucleic Acid ; Xenopus/*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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  • 8
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    Active T-cell receptor genes have intron deoxyribonuclease hypersensitive sites (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-08-09
    Description: The T-cell receptor beta-chain gene has a nuclease hypersensitive site in several kinds of T cells, which does not appear in B cells expressing immunoglobulins. Conversely, the kappa immunoglobulin gene shows a known hypersensitive site at its enhancer element in B cells, as expected, but this site is absent in T cells. As is the case with immunoglobulin genes, the T-cell receptor site lies within the gene, in the intron separating joining and constant region segments. These nuclease hypersensitive DNA configurations in the introns of active T-cell receptor and immunoglobulin genes may arise from control elements that share ancestry but have diverged to the extent that each normally acts only in lymphoid cells which use the proximal gene product.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bier, E -- Hashimoto, Y -- Greene, M I -- Maxam, A M -- AI 19901/AI/NIAID NIH HHS/ -- CA 22427/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 Aug 9;229(4713):528-34.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3927483" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/metabolism ; Base Sequence ; Binding Sites ; Cell Line ; Chromosome Mapping ; Collodion ; Deoxyribonuclease I/*metabolism ; Enhancer Elements, Genetic ; Gene Expression Regulation ; Humans ; Hybridomas ; Immunochemistry ; Immunoglobulin Fragments/*genetics ; Immunoglobulin Heavy Chains/genetics ; Immunoglobulin kappa-Chains/genetics ; Mice ; Receptors, Antigen, T-Cell/*genetics ; T-Lymphocytes/*metabolism ; Transcription, Genetic
    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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  • 9
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    Strategies and applications of in vitro mutagenesis (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-09-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Botstein, D -- Shortle, D -- New York, N.Y. -- Science. 1985 Sep 20;229(4719):1193-201.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2994214" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Base Sequence ; Cloning, Molecular/*methods ; DNA Transposable Elements ; DNA, Bacterial ; DNA, Recombinant ; Drosophila melanogaster/genetics ; Escherichia coli/genetics ; In Vitro Techniques ; Mutagenicity Tests/*methods ; *Mutation ; Oligonucleotides ; Phenotype
    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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  • 10
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    The "spliceosome": yeast pre-messenger RNA associates with a 40S complex in a splicing-dependent reaction (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-05-24
    Description: The in vitro splicing reactions of pre-messenger RNA (pre-mRNA) in a yeast extract were analyzed by glycerol gradient centrifugation. Labeled pre-mRNA appears in a 40S peak only if the pre-mRNA undergoes the first of the two partial splicing reactions. RNA analysis after extraction of glycerol gradient fractions shows that lariat-form intermediates, molecules that occur only in mRNA splicing, are found almost exclusively in this 40S complex. Another reaction intermediate, cut 5' exon RNA, can also be found concentrated in this complex. The complex is stable even in 400 mM KCl, although at this salt concentration, it sediments at 35S and is clearly distinguishable from 40S ribosomal subunits. This complex, termed a "spliceosome," is thought to contain components necessary for mRNA splicing; its existence can explain how separated exons on pre-mRNA are brought into contact.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brody, E -- Abelson, J -- New York, N.Y. -- Science. 1985 May 24;228(4702):963-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3890181" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/genetics ; Base Sequence ; Centrifugation, Density Gradient ; Mutation ; Nucleic Acid Conformation ; Nucleic Acid Precursors/*genetics/metabolism ; RNA Precursors ; *RNA Splicing ; RNA, Fungal/*genetics/metabolism ; RNA, Messenger/*genetics/metabolism ; Saccharomyces cerevisiae/*genetics/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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