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  • Articles  (41)
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  • Articles  (41)
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  • American Association for the Advancement of Science (AAAS)  (41)
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  • 1
    Publication Date: 1985-11-15
    Description: The gene encoding the circumsporozoite (CS) protein of the human malaria parasite Plasmodium vivax has been cloned. The deduced sequence of the protein consists of 373 amino acids with a central region of 19 tandem repeats of the nonapeptide Asp-Arg-Ala-Asp/Ala-Gly-Gln-Pro-Ala-Gly. A synthetic 18-amino acid peptide containing two tandem repeats binds to a monoclonal antibody directed to the CS protein of Plasmodium vivax and inhibits the interaction of this antibody with the native protein in sporozoite extracts. The portions of the CS gene that do not contain repeats are closely related to the corresponding regions of the CS genes of two simian malarias, Plasmodium cynomolgi and Plasmodium knowlesi. In contrast, the homology between the CS genes of Plasmodium vivax and Plasmodium falciparum, another malaria parasite of humans, is very limited.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arnot, D E -- Barnwell, J W -- Tam, J P -- Nussenzweig, V -- Nussenzweig, R S -- Enea, V -- New York, N.Y. -- Science. 1985 Nov 15;230(4727):815-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2414847" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibodies, Monoclonal/immunology ; Antigens, Surface/*genetics/immunology ; Cloning, Molecular ; Epitopes/*genetics/immunology ; Haplorhini/parasitology ; Humans ; Malaria/parasitology ; Nucleic Acid Hybridization ; Plasmodium/immunology ; Plasmodium vivax/*genetics/immunology ; *Protozoan Proteins ; Repetitive Sequences, Nucleic Acid
    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: 1985-12-06
    Description: Two transgenic mice were obtained that contain in their chromosomes the complete hepatitis B virus (HBV) genome except for the core gene. These mice secrete particles of HBV surface antigen (HBsAg) in the serum. In one mouse, HBV DNA sequences that had integrated at two different sites were shown to segregate independently in the first filial generation (F1) and only one of the sequences allowed expression of the surface antigen. Among these animals the males produced five to ten times more HBsAg than the females. A 2.1-kilobase messenger RNA species comigrating with the major surface gene messenger RNA is expressed specifically in the liver in the two original mice. The results suggest that the HBV sequences introduced into the mice are able to confer a tissue-specific expression to the S gene. In addition, the HBV transgenic mice represent a new model for the chronic carrier state of hepatitis B virus infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Babinet, C -- Farza, H -- Morello, D -- Hadchouel, M -- Pourcel, C -- CA37300-02/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 Dec 6;230(4730):1160-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3865370" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier State ; DNA, Recombinant ; Female ; *Genetic Engineering ; Hepatitis B/genetics ; Hepatitis B Surface Antigens/*genetics ; Humans ; Male ; Mice ; Mice, Inbred C57BL/genetics ; Nucleic Acid Hybridization ; RNA, Messenger/genetics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1985-04-12
    Description: Activated versions of ras genes have been found in various types of malignant tumors. The normal versions of these genes are found in organisms as diverse as mammals and yeasts. Yeast cells that lack their functional ras genes, RASSC-1 and RASSC-2, are ordinarily nonviable. They have now been shown to remain viable if they carry a mammalian rasH gene. In addition, yeast-mammalian hybrid genes and a deletion mutant yeast RASSC-1 gene were shown to induce morphologic transformation of mouse NIH 3T3 cells when the genes had a point mutation analogous to one that increases the transforming activity of mammalian ras genes. The results establish the functional relevance of the yeast system to the genetics and biochemistry of cellular transformation induced by mammalian ras genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DeFeo-Jones, D -- Tatchell, K -- Robinson, L C -- Sigal, I S -- Vass, W C -- Lowy, D R -- Scolnick, E M -- CA37702/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 Apr 12;228(4696):179-84.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3883495" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Transformation, Neoplastic/metabolism ; DNA, Recombinant/metabolism ; Drosophila/genetics ; Mice ; Neoplasm Proteins/*genetics/metabolism ; Nucleic Acid Hybridization ; *Oncogenes ; Plasmids ; Saccharomyces cerevisiae/*genetics
    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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  • 4
    Publication Date: 1985-03-01
    Description: A human complementary DNA clone specific for the alpha-chain of the T-cell receptor and a panel of rodent X human somatic cell hybrids were used to map the alpha-chain gene to human chromosome 14 in a region proximal to the immunoglobulin heavy chain locus. Analysis by means of in situ hybridization of human metaphase chromosomes served to further localize the alpha-chain gene to region 14q11q12, which is consistently involved in translocations and inversions detectable in human T-cell leukemias and lymphomas. Thus, the locus for the alpha-chain T-cell receptor may participate in oncogene activation in T-cell tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Croce, C M -- Isobe, M -- Palumbo, A -- Puck, J -- Ming, J -- Tweardy, D -- Erikson, J -- Davis, M -- Rovera, G -- CA 10 815/CA/NCI NIH HHS/ -- CA16685/CA/NCI NIH HHS/ -- CA215875/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 Mar 1;227(4690):1044-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3919442" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosome Mapping ; Chromosomes, Human, 13-15 ; DNA/genetics ; Genes ; Humans ; Hybrid Cells/metabolism ; Immunoglobulin Heavy Chains/*genetics ; Immunoglobulin alpha-Chains/*genetics ; Leukemia/genetics ; Lymphoma/genetics ; Mice ; Nucleic Acid Hybridization ; Receptors, Antigen, T-Cell/*genetics ; T-Lymphocytes ; Translocation, Genetic
    Print ISSN: 0036-8075
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  • 5
    Publication Date: 1985-09-20
    Description: A repeated 82 base pair sequence in genomic DNA of the rat was previously proposed as being a control element governing brain (neuron) specific genetic expression. This intronic sequence, termed the brain "identifier" (ID), is complementary to small RNA species localized in brain cytoplasm, and it was thought to be represented specifically in RNA produced by brain nuclei in vitro. The RNA blot analyses of total nuclear and polyadenylated heterogeneous nuclear RNA described in the present report show that this ID sequence is also present in the liver and kidney in abundances similar to those in the brain. This repeated sequence is not, therefore, restricted to transcripts produced in the brain as suggested from previous transcriptional "runoff" experiments. Measurements on rat and mouse nuclear RNA indicate that the abundance of ID sequence transcript is roughly proportional to the number of copies of this repeat in the respective genomes. This suggests a rather random genomic location and transcription of this sequence. From these results it seems improbable that the ID sequence functions as a transcriptional-level control element in genes expressed specifically in the brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owens, G P -- Chaudhari, N -- Hahn, W E -- NS10813/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1985 Sep 20;229(4719):1263-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2412293" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Brain Chemistry ; Cloning, Molecular ; *Genes ; Kidney/analysis ; Liver/analysis ; Mice ; Neural Crest/analysis ; Nucleic Acid Hybridization ; RNA/*analysis ; Rats ; Transcription, Genetic
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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1985-09-20
    Description: During normal mouse development the relative amounts of two types of U1 small nuclear RNA's (U1 RNA) change significantly. Fetal tissues have comparable levels of the two major types of mouse U1 RNA's, mU1a and mU1b, whereas most differentiated adult tissues contain only mU1a RNA's. Those adult tissues that also accumulate detectable amounts of embryonic (mU1b) RNA's (for example, testis, spleen, and thymus) contain a significant proportion of stem cells capable of further differentiation. Several strains of mice express minor sequence variants of U1 RNA's that are subject to the same developmental controls as the major types of adult and embryonic U1 RNA. The differential accumulation of embryonic U1 RNA's may influence the pattern of gene expression during early development and differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lund, E -- Kahan, B -- Dahlberg, J E -- CA 33453/CA/NCI NIH HHS/ -- GM 30220/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 Sep 20;229(4719):1271-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2412294" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Base Sequence ; Brain/*growth & development/metabolism ; Cell Line ; Embryonic and Fetal Development ; Liver/*growth & development/metabolism ; Male ; Mice ; Mice, Inbred ICR ; Neoplastic Stem Cells/metabolism ; Nucleic Acid Hybridization ; RNA/*biosynthesis ; RNA, Messenger/biosynthesis ; RNA, Small Nuclear ; Testis/*growth & development/metabolism
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  • 7
    Publication Date: 1985-12-20
    Description: Two new methods were used to establish a rapid and highly sensitive prenatal diagnostic test for sickle cell anemia. The first involves the primer-mediated enzymatic amplification of specific beta-globin target sequences in genomic DNA, resulting in the exponential increase (220,000 times) of target DNA copies. In the second technique, the presence of the beta A and beta S alleles is determined by restriction endonuclease digestion of an end-labeled oligonucleotide probe hybridized in solution to the amplified beta-globin sequences. The beta-globin genotype can be determined in less than 1 day on samples containing significantly less than 1 microgram of genomic DNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saiki, R K -- Scharf, S -- Faloona, F -- Mullis, K B -- Horn, G T -- Erlich, H A -- Arnheim, N -- New York, N.Y. -- Science. 1985 Dec 20;230(4732):1350-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2999980" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Anemia, Sickle Cell/*diagnosis/genetics ; Base Sequence ; Clinical Laboratory Techniques ; DNA Restriction Enzymes ; DNA-Directed DNA Polymerase ; Escherichia coli ; *Gene Amplification ; Globins/*genetics ; Humans ; Nucleic Acid Hybridization ; Polymorphism, Genetic
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1985-11-01
    Description: Transposon mutagenesis of the bacterium Myxococcus xanthus with the transposon Tn5 revealed a special class of bacterial mutants that transduced the transposon through culture supernatant fluids. Virus-like particles copurified with transducing activity. Transposon tagging for detecting these virus-like particles may be generally useful in isolating endogenous viral agents capable of transferring genetic information between cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Starich, T -- Cordes, P -- Zissler, J -- CA 09138/CA/NCI NIH HHS/ -- GM 19557/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 Nov 1;230(4725):541-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2996138" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteriophages/*analysis ; Centrifugation, Isopycnic ; *DNA Transposable Elements ; Microscopy, Electron ; *Mutation ; Myxococcales/*genetics ; Nucleic Acid Hybridization ; Virion/analysis
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  • 9
    Publication Date: 1985-12-06
    Description: A complementary DNA library was constructed from messenger RNA's extracted from the brains of mice infected with the scrapie agent. The library was differentially screened with the objectives of finding clones that might be used as markers of infection and finding clones of genes whose increased expression might be correlated with the pathological changes common to scrapie and Alzheimer's disease. A gene was identified whose expression is increased in scrapie. The complementary DNA corresponding to this gene hybridized preferentially and focally to cells in the brains of scrapie-infected animals. The cloned DNA also hybridized to the neuritic plaques found with increased frequency in brains of patients with Alzheimer's disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wietgrefe, S -- Zupancic, M -- Haase, A -- Chesebro, B -- Race, R -- Frey, W 2nd -- Rustan, T -- Friedman, R L -- New York, N.Y. -- Science. 1985 Dec 6;230(4730):1177-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3840915" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/*genetics/pathology ; Animals ; Brain/*metabolism/pathology ; Cloning, Molecular ; Cricetinae ; DNA/genetics ; Humans ; Mice ; Nucleic Acid Hybridization ; RNA, Messenger/genetics ; Scrapie/*genetics/pathology ; Sheep
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  • 10
    Publication Date: 1985-05-10
    Description: Consistent chromosomal translocations in neoplastic cells may alter the expression of proto-oncogenes that are located near the breakpoints. The complementary DNA sequence of the human insulin receptor is similar to those of the EGF receptor (erbB oncogene) and products of the src family of oncogenes. With in situ hybridization and Southern blot analysis of somatic cell hybrid DNA, the human insulin receptor gene was mapped to the distal short arm of chromosome 19 (bands p13.2----p13.3), a site involved in a nonrandom translocation in pre-B-cell acute leukemia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang-Feng, T L -- Francke, U -- Ullrich, A -- GM 26105/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 May 10;228(4700):728-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3873110" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes ; *Chromosome Mapping ; *Chromosomes, Human, 19-20 ; Cricetinae ; Cricetulus ; Humans ; Hybrid Cells/metabolism ; Leukemia, Lymphoid/*genetics ; Nucleic Acid Hybridization ; Receptor, Insulin/*genetics ; Translocation, Genetic
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