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  • Articles  (4,073)
  • Latest Papers from Table of Contents or Articles in Press  (4,073)
  • Humans  (2,768)
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  • United States  (705)
  • Amino Acid Sequence  (700)
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  • Magnetism
  • 1995-1999  (4,073)
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  • Articles  (4,073)
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  • 1
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    Structural basis of Smad2 recognition by the Smad anchor for receptor activation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: The Smad proteins mediate transforming growth factor-beta (TGFbeta) signaling from the transmembrane serine-threonine receptor kinases to the nucleus. The Smad anchor for receptor activation (SARA) recruits Smad2 to the TGFbeta receptors for phosphorylation. The crystal structure of a Smad2 MH2 domain in complex with the Smad-binding domain (SBD) of SARA has been determined at 2.2 angstrom resolution. SARA SBD, in an extended conformation comprising a rigid coil, an alpha helix, and a beta strand, interacts with the beta sheet and the three-helix bundle of Smad2. Recognition between the SARA rigid coil and the Smad2 beta sheet is essential for specificity, whereas interactions between the SARA beta strand and the Smad2 three-helix bundle contribute significantly to binding affinity. Comparison of the structures between Smad2 and a comediator Smad suggests a model for how receptor-regulated Smads are recognized by the type I receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, G -- Chen, Y G -- Ozdamar, B -- Gyuricza, C A -- Chong, P A -- Wrana, J L -- Massague, J -- Shi, Y -- CA85171/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):92-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory, Princeton, NJ 08544, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615055" target="_blank"〉PubMed〈/a〉
    Keywords: *Activin Receptors, Type I ; Amino Acid Sequence ; Binding Sites ; Carrier Proteins/*chemistry/*metabolism ; Crystallography, X-Ray ; DNA-Binding Proteins/*chemistry/genetics/*metabolism ; Hydrogen Bonding ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Point Mutation ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/chemistry/genetics/metabolism ; Receptors, Transforming Growth Factor beta/chemistry/genetics/metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Signal Transduction ; Smad2 Protein ; Trans-Activators/*chemistry/genetics/*metabolism ; Zinc Fingers
    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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    DNA topoisomerase IIbeta and neural development (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: DNA topoisomerase IIbeta is shown to have an unsuspected and critical role in neural development. Neurogenesis was normal in IIbeta mutant mice, but motor axons failed to contact skeletal muscles, and sensory axons failed to enter the spinal cord. Despite an absence of innervation, clusters of acetylcholine receptors were concentrated in the central region of skeletal muscles, thereby revealing patterning mechanisms that are autonomous to skeletal muscle. The defects in motor axon growth in IIbeta mutant mice resulted in a breathing impairment and death of the pups shortly after birth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, X -- Li, W -- Prescott, E D -- Burden, S J -- Wang, J C -- NS10537/NS/NINDS NIH HHS/ -- NS27963/NS/NINDS NIH HHS/ -- NS36193/NS/NINDS NIH HHS/ -- R01 NS036193/NS/NINDS NIH HHS/ -- R01 NS036193-02/NS/NINDS NIH HHS/ -- R01 NS041311/NS/NINDS NIH HHS/ -- R01 NS041311-03/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):131-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Skirball Institute of Molecular Medicine, New York University Medical School, 540 First Avenue, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615047" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*physiology/ultrastructure ; Cell Lineage ; Cues ; DNA Repair ; DNA Topoisomerases, Type II/genetics/*metabolism ; DNA-Binding Proteins ; Diaphragm/chemistry/embryology/innervation ; Embryonic and Fetal Development ; Gene Targeting ; Intercostal Muscles/innervation ; Mice ; Mice, Knockout ; Motor Neurons/physiology/ultrastructure ; Muscle, Skeletal/embryology/*innervation ; Neuromuscular Junction/*embryology/growth & development ; Neurons, Afferent/physiology/ultrastructure ; Presynaptic Terminals/ultrastructure ; Receptors, Cholinergic/analysis ; Skin/innervation ; Spinal Cord/embryology/ultrastructure
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    A mammalian H+ channel generated through alternative splicing of the NADPH oxidase homolog NOH-1 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: Voltage-gated proton (H+) channels are found in many human and animal tissues and play an important role in cellular defense against acidic stress. However, a molecular identification of these unique ion conductances has so far not been achieved. A 191-amino acid protein is described that, upon heterologous expression, has properties indistinguishable from those of native H+ channels. This protein is generated through alternative splicing of messenger RNA derived from the gene NOH-1 (NADPH oxidase homolog 1, where NADPH is the reduced form of nicotinamide adenine dinucleotide phosphate).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Banfi, B -- Maturana, A -- Jaconi, S -- Arnaudeau, S -- Laforge, T -- Sinha, B -- Ligeti, E -- Demaurex, N -- Krause, K H -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):138-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biology of Aging Laboratory, Department of Geriatrics, Geneva University Hospitals, Geneva Medical School, CH-1211 Geneva 4, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615049" target="_blank"〉PubMed〈/a〉
    Keywords: *Alternative Splicing ; Amino Acid Sequence ; Cell Line ; Cytosol/metabolism ; Electric Conductivity ; Electron Transport ; Expressed Sequence Tags ; Humans ; Hydrogen/*metabolism ; Hydrogen-Ion Concentration ; Ion Channel Gating ; Ion Channels/chemistry/*genetics/metabolism ; Membrane Glycoproteins/chemistry/*genetics ; Molecular Sequence Data ; NADPH Oxidase/chemistry/*genetics ; Patch-Clamp Techniques ; Protons ; Transfection ; Tumor Cells, Cultured ; Zinc/pharmacology
    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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    Stat3-mediated transformation of NIH-3T3 cells by the constitutively active Q205L Galphao protein (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: Expression of Q205L Galphao (Galphao*), an alpha subunit of heterotrimeric guanine nucleotide-binding proteins (G proteins) that lacks guanosine triphosphatase (GTPase) activity in NIH-3T3 cells, results in transformation. Expression of Galphao* in NIH-3T3 cells activated signal transducer and activator of transcription 3 (Stat3) but not mitogen-activated protein (MAP) kinases 1 or 2. Coexpression of dominant negative Stat3 inhibited Galphao*-induced transformation of NIH-3T3 cells and activation of endogenous Stat3. Furthermore, Galphao* expression increased activity of the tyrosine kinase c-Src, and the Galphao*-induced activation of Stat3 was blocked by expression of Csk (carboxyl-terminal Src kinase), which inactivates c-Src. The results indicate that Stat3 can function as a downstream effector for Galphao* and mediate its biological effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ram, P T -- Horvath, C M -- Iyengar, R -- 1F32 CA79134-01/CA/NCI NIH HHS/ -- DK-38671/DK/NIDDK NIH HHS/ -- GM-54508/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):142-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Immunobiology Center, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USA. ramp01@doc.mssm.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615050" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Cell Line, Transformed ; *Cell Transformation, Neoplastic ; DNA-Binding Proteins/*metabolism ; Enzyme Activation ; GTP-Binding Protein alpha Subunits ; Genes, Reporter ; Heterotrimeric GTP-Binding Proteins/genetics/*metabolism ; MAP Kinase Signaling System ; Mice ; Mitogen-Activated Protein Kinase 1/metabolism ; Mitogen-Activated Protein Kinases/metabolism ; Neurites/physiology ; Neuronal Plasticity ; Neurons/metabolism/physiology ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein-Tyrosine Kinases/metabolism ; STAT3 Transcription Factor ; Signal Transduction ; Trans-Activators/*metabolism ; Transfection ; src-Family Kinases
    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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    Sex determination in malaria parasites (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-30
    Description: A century ago, W. G. MacCallum identified distinct male and female forms in malaria parasites of both birds and humans. Since then, scientists have been puzzled by the high female-to-male ratios of parasites in Plasmodium infections and by the mechanism of sex determination. The sex ratio of malaria parasites was shown to become progressively more male as conditions that allow motility and subsequent fertilization by the male parasites become adverse. This resulted from an increased immune response against male gametes, which coincides with intense host erythropoietic activity. Natural and artificial induction of erythropoiesis in vertebrate hosts provoked a shift toward male parasite production. This change in parasite sex ratio led to reduced reproductive success in the parasite, which suggests that sex determination is adaptive and is regulated by the hematologic state of the host.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paul, R E -- Coulson, T N -- Raibaud, A -- Brey, P T -- New York, N.Y. -- Science. 2000 Jan 7;287(5450):128-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Biochimie et Biologie Moleculaire des Insectes, Institut Pasteur, 25 Rue du Dr. Roux, 75724 Paris Cedex 15, France. topotito@pasteur.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10615046" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/parasitology ; Animals ; Chickens ; Erythrocytes/parasitology ; *Erythropoiesis ; Erythropoietin/pharmacology ; Female ; Malaria/*blood/*parasitology ; Malaria, Avian/blood/parasitology ; Male ; Mice ; Plasmodium/growth & development/*physiology ; Plasmodium gallinaceum/growth & development/*physiology ; Recombinant Proteins/pharmacology ; Reproduction ; Reticulocytes/parasitology ; Sex Determination Processes ; Sex Ratio
    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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    Transplants from pigs (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Collignon, P -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1855-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610574" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Viral/analysis ; *Gammaretrovirus/immunology ; Humans ; Retroviridae Infections/diagnosis/*transmission ; *Swine/virology ; *Transplantation, Heterologous/adverse effects
    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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    Need for neutron diffraction instruments (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Langan, P -- Schoenborn, B P -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1089.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610521" target="_blank"〉PubMed〈/a〉
    Keywords: Crystallography/*instrumentation ; *Neutrons ; Proteins/*chemistry ; 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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  • 8
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    Stem cells. Rat spinal cord function partially restored (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1826-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610569" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/cytology ; Cell Differentiation ; Cell Survival ; Embryo, Mammalian ; Mice ; Neurons/cytology ; Oligodendroglia/cytology ; Rats ; Spinal Cord/cytology/*physiology ; Spinal Cord Injuries/*therapy ; *Stem Cell Transplantation ; Stem Cells/cytology
    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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    Perspectives: protein structure. Class-conscious TCR? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, I A -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1867-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. wilson@scripps.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610577" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens/*chemistry/immunology/metabolism ; Binding Sites ; CD4-Positive T-Lymphocytes/immunology/metabolism ; CD8-Positive T-Lymphocytes/immunology/metabolism ; Crystallography, X-Ray ; Histocompatibility Antigens Class I/chemistry/immunology/metabolism ; Histocompatibility Antigens Class II/*chemistry/immunology/metabolism ; Mice ; Models, Molecular ; Peptides/chemistry/immunology/metabolism ; Protein Binding ; Protein Conformation ; Protein Structure, Secondary ; Receptors, Antigen, T-Cell, alpha-beta/*chemistry/immunology/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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  • 10
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    Nutraceuticals (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Curry, M -- Hazard-Daniel, A -- Daniel, H J -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1854-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610573" target="_blank"〉PubMed〈/a〉
    Keywords: *Dietary Supplements/adverse effects ; Drug Prescriptions ; Drug-Related Side Effects and Adverse Reactions ; *Legislation, Drug ; *Legislation, Food ; United States ; United States Food and Drug Administration
    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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