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  • Articles  (6,515)
  • 1990-1994  (6,515)
  • 1955-1959
  • 1991  (6,515)
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  • Articles  (6,515)
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  • 1990-1994  (6,515)
  • 1955-1959
Year
Journal
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  • 1
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    Isolation of an active human transposable element (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-30
    Description: Two de novo insertions of truncated L1 elements into the factor VIII gene on the X chromosome have been identified that produced hemophilia A. A full-length L1 element that is the likely progenitor of one of these insertions was isolated by its sequence identity to the factor VIII insertion. This L1 element contains two open-reading frames and is one of at least four alleles of a locus on chromosome 22 that has been occupied by an L1 element for at least 6 million years.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dombroski, B A -- Mathias, S L -- Nanthakumar, E -- Scott, A F -- Kazazian, H H Jr -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1805-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1662412" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Base Sequence ; Chromosomes, Human, Pair 22 ; *DNA Transposable Elements ; Factor VIII/*genetics ; Genome, Human ; Hemophilia A/*genetics ; Humans ; Molecular Sequence Data ; Open Reading Frames ; Restriction Mapping ; Sequence Homology, Nucleic Acid ; X Chromosome
    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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    Long-term improvement of hypercholesterolemia after ex vivo gene therapy in LDLR-deficient rabbits (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-30
    Description: Familial hypercholesterolemia (FH) is an inherited disorder in humans that is caused by a deficiency of low density lipoprotein receptors (LDLRs). An animal model for FH, the Watanabe Heritable Hyperlipidemic rabbit, was used to develop an approach for liver-directed gene therapy based on transplantation of autologous hepatocytes that were genetically corrected ex vivo with recombinant retroviruses. Animals transplanted with LDLR-transduced autologous hepatocytes demonstrated a 30 to 50 percent decrease in total serum cholesterol that persisted for the duration of the experiment (122 days). Recombinant-derived LDLR RNA was harvested from tissues with no diminution for up to 6.5 months after transplantation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chowdhury, J R -- Grossman, M -- Gupta, S -- Chowdhury, N R -- Baker, J R Jr -- Wilson, J M -- P01-DK-42718/DK/NIDDK NIH HHS/ -- R01-DK-34357/DK/NIDDK NIH HHS/ -- R01-DK42193-01/DK/NIDDK NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1802-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, Albert Einstein College of Medicine, Bronx, NY 10461.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1722351" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Gene Expression ; *Genetic Therapy ; Hypercholesterolemia/*genetics/*therapy ; Liver/physiology ; Liver Transplantation/physiology ; RNA/genetics/isolation & purification ; Rabbits ; Receptors, LDL/analysis/*genetics ; Recombinant Proteins/analysis ; Serum Albumin/analysis/genetics ; *Transfection ; beta-Galactosidase/analysis/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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  • 3
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    Reverse transcriptase encoded by a human transposable element (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-30
    Description: L1 elements are highly repeated mammalian DNA sequences whose structure suggests dispersal by retrotransposition. A consensus L1 element encodes a protein with sequence similarity to known reverse transcriptases. The second open reading frame from the human L1 element L1.2A was expressed as a fusion protein targeted to Ty1 virus-like particles in Saccharomyces cerevisiae and shown to have reverse transcriptase activity. This activity was eliminated by a missense mutation in the highly conserved amino acid motif Y/F-X-D-D. Thus, L1 represents a potential source of the reverse transcriptase activity necessary for dispersion of the many classes of mammalian retroelements.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mathias, S L -- Scott, A F -- Kazazian, H H Jr -- Boeke, J D -- Gabriel, A -- AI00803/AI/NIAID NIH HHS/ -- CA16519/CA/NCI NIH HHS/ -- GM28931/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1808-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1722352" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cloning, Molecular ; *DNA Transposable Elements ; Epitopes/analysis ; Humans ; Immunoblotting ; Kinetics ; Molecular Sequence Data ; Oligodeoxyribonucleotides ; Open Reading Frames ; Plasmids ; Polyribonucleotides ; RNA-Directed DNA Polymerase/*genetics/isolation & purification/metabolism ; Recombinant Fusion Proteins/isolation & purification/metabolism ; Saccharomyces cerevisiae/genetics ; Templates, 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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    Intrasubunit signal transduction by the aspartate chemoreceptor (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-23
    Description: Receptors that transmit signals across cell membranes are typically composed of multiple subunits. To test whether subunit interactions are required for transmembrane signaling by the bacterial aspartate receptor, dimers were constructed with (i) two full-length subunits, (ii) one full-length subunit and one subunit lacking the cytoplasmic domain, or (iii) one full-length subunit and one subunit lacking both the cytoplasmic and the transmembrane domains. Methylation of the cytoplasmic domain of all three receptor constructs was stimulated by the binding of aspartate. These findings demonstrate that transmembrane signaling does not require interactions between cytoplasmic or transmembrane domains of adjacent subunits and suggest that signaling occurs via conformational changes transduced through a single subunit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Milligan, D L -- Koshland, D E Jr -- DK 09765/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1991 Dec 13;254(5038):1651-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1661030" target="_blank"〉PubMed〈/a〉
    Keywords: Aspartic Acid/*physiology ; DNA Mutational Analysis ; Ligands ; Macromolecular Substances ; Methylation ; Protein Conformation ; *Receptors, Amino Acid ; Receptors, Cell Surface/*chemistry ; Recombinant Proteins ; Salmonella typhimurium ; Signal Transduction ; Structure-Activity Relationship
    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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    Inhibition of Rap1A binding to cytochrome b558 of NADPH oxidase by phosphorylation of Rap1A (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-20
    Description: Rap1A is a low molecular weight guanosine triphosphate (GTP)-binding protein in human neutrophil membranes whose cellular function is unknown. Rap1A was found to form stoichiometric complexes with the cytochrome b558 component of the phagocyte nicotinamide adenine dinucleotide phosphate (NADPH) oxidase system. The (guanosine-5'-O-(3-thiotriphosphate) (GTP-gamma-S)-bound form of Rap1A bound more tightly to cytochrome b558 than did the guanosine diphosphate-bound form. No complex formation was observed between cytochrome b558 and H-Ras-GTP-gamma-S or Rap1A-GTP-gamma-S that had been heat-inactivated, nor between Rap1A-GTP-gamma-S and hydrophobic proteins serving as controls. Complex formation between Rap1A-GTP-gamma-S and cytochrome b558 was inhibited by phosphorylation of Rap1A with cyclic adenosine monophosphate (cAMP)-dependent protein kinase. These observations suggest that Rap1A may participate in the structure or regulation of the NADPH oxidase system and that this function of the Rap1A protein may be altered by phosphorylation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bokoch, G M -- Quilliam, L A -- Bohl, B P -- Jesaitis, A J -- Quinn, M T -- 5RO126711/PHS HHS/ -- GM39434/GM/NIGMS NIH HHS/ -- GM44428/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1794-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Scripps Research Institute, La Jolla, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1763330" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Chromatography, Gel ; Cytochrome b Group/isolation & purification/*metabolism ; GTP-Binding Proteins/antagonists & inhibitors/isolation & ; purification/*metabolism ; Guanosine 5'-O-(3-Thiotriphosphate)/metabolism ; Humans ; Kinetics ; Macromolecular Substances ; NADH, NADPH Oxidoreductases/*metabolism ; NADPH Oxidase ; Neutrophils/enzymology ; Phosphorylation ; Protein Binding ; Protein Kinase C/metabolism ; Proto-Oncogene Proteins/metabolism ; Recombinant Proteins/antagonists & inhibitors/isolation & purification/metabolism ; rap GTP-Binding Proteins
    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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    Breast cancer: stalemate in the war on cancer (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1719-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1763320" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/*economics/prevention & control/therapy ; Female ; Government Agencies ; Humans ; National Institutes of Health (U.S.) ; Research Support as Topic ; United States
    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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    Feverish materialism in snowy Boston: fullerenes still in prime time (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1991 Dec 20;254(5039):1730.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17829235" target="_blank"〉PubMed〈/a〉
    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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    Oscillatory kinetics and spatio-temporal self-organization in reactions at solid surfaces (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-20
    Description: Chemical reactions far from equilibrium on solid surfaces may exhibit typical phenomena of nonlinear dynamics, as exemplified by the catalytic oxidation of carbon monoxide on a platinum(110) single-crystal surface. Depending on the external parameters (temperature and partial pressures of the reactants), the temporal variation of the reaction rate may become oscillatory or even chaotic. In a parallel way, the concentration distributions of the adsorbed species on the surface form spatio-temporal patterns including propagating and standing waves, rotating spirals, as well as irregular and rapidly changing structures denoted "chemical turbulence."〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ertl, G -- New York, N.Y. -- Science. 1991 Dec 20;254(5039):1750-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17829239" target="_blank"〉PubMed〈/a〉
    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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    Britannica in the doghouse (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1991 Dec 20;254(5039):1724.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17829230" target="_blank"〉PubMed〈/a〉
    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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    New AIDS drug poised to move into development (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-12-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1991 Dec 20;254(5039):1715.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1763318" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*drug therapy ; Antiviral Agents/*therapeutic use/toxicity ; *Benzodiazepines ; Drug Evaluation ; Drug Industry ; Gene Products, tat/*antagonists & inhibitors ; HIV/drug effects ; Humans ; *Pyrroles ; United States ; tat Gene Products, Human Immunodeficiency Virus
    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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