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  • Articles  (11,392)
  • 550 - Earth sciences  (10,758)
  • Models, Biological  (634)
  • 2005-2009  (6,595)
  • 2000-2004  (4,797)
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  • Articles  (11,392)
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  • 1
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    Signal transduction. History matters (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-08-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ingolia, Nicholas T -- Murray, Andrew W -- New York, N.Y. -- Science. 2002 Aug 9;297(5583):948-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology and Bauer Center for Genomics Research, Harvard University, Cambridge, MA 02138, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12169717" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; Biological Evolution ; *Cell Cycle Proteins ; Cells, Cultured ; Dual Specificity Phosphatase 1 ; *Feedback, Physiological ; Immediate-Early Proteins/*metabolism ; *MAP Kinase Signaling System ; Mitogen-Activated Protein Kinases/*metabolism ; Models, Biological ; *Phosphoprotein Phosphatases ; Platelet-Derived Growth Factor/metabolism/pharmacology ; Protein Phosphatase 1 ; Protein Tyrosine Phosphatases/*metabolism
    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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    Cell biology. Microtubule asymmetry (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-06-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gundersen, Gregg G -- Bretscher, Anthony -- New York, N.Y. -- Science. 2003 Jun 27;300(5628):2040-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Cell Biology and Department of Pathology, Columbia University, New York, NY 10032, USA. ggg1@columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12829769" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; CDC28 Protein Kinase, S cerevisiae/*metabolism ; Cell Cycle Proteins/metabolism ; Cell Division ; Cell Polarity ; Cyclins/metabolism ; Microtubule Proteins/metabolism ; Microtubule-Organizing Center/*metabolism/ultrastructure ; Microtubules/*metabolism/ultrastructure ; Models, Biological ; Mutation ; Myosin Heavy Chains/metabolism ; Myosin Type V/metabolism ; Nuclear Proteins/*metabolism ; Phosphorylation ; Protein Transport ; Saccharomyces cerevisiae/cytology/metabolism/ultrastructure ; Saccharomyces cerevisiae Proteins/metabolism ; Spindle Apparatus/*physiology/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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    Botany. State transitions--a question of balance (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Allen, John F -- New York, N.Y. -- Science. 2003 Mar 7;299(5612):1530-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Biochemistry, Center for Chemistry and Chemical Engineering, Box 124, Lund University, SE-221 00 Lund, Sweden. john.allen@plantbio.lu.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12624254" target="_blank"〉PubMed〈/a〉
    Keywords: Algal Proteins/chemistry/genetics/isolation & purification/metabolism ; Animals ; Binding Sites ; Chlamydomonas reinhardtii/*enzymology/genetics/metabolism ; Chlorophyll/metabolism ; Electron Transport ; Fluorescence ; Gene Library ; Light ; Light-Harvesting Protein Complexes ; Models, Biological ; Mutation ; Oxidation-Reduction ; Phosphorylation ; Photosynthesis ; Photosynthetic Reaction Center Complex Proteins/*metabolism ; Plastoquinone/metabolism ; Protein-Serine-Threonine Kinases/chemistry/genetics/*isolation & ; purification/*metabolism ; Signal Transduction ; Thylakoids/*enzymology ; 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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    A niche maintaining germ line stem cells in the Drosophila ovary (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-13
    Description: Stromal cells are thought to generate specific regulatory microenviroments or "niches" that control stem cell behavior. Characterizing stem cell niches in vivo remains an important goal that has been difficult to achieve. The individual ovarioles of the Drosophila ovary each contain about two germ line stem cells that maintain oocyte production. Here we show that anterior ovariolar somatic cells comprising three cell types act as a germ line stem cell niche. Germ line stem cells lost by normal or induced differentiation are efficiently replaced, and the ability to repopulate the niche increases the functional lifetime of ovarioles in vivo. Our studies implicate one of the somatic cell types, the cap cells, as a key niche component.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xie, T -- Spradling, A C -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2000 Oct 13;290(5490):328-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Embryology, Howard Hughes Medical Institute, Carnegie Institution of Washington, 115 West University Parkway, Baltimore, MD 21210, USA. tgx@stowers-institute.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11030649" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; Cell Communication ; Cell Differentiation ; Drosophila/*cytology/physiology ; Female ; Germ Cells/*cytology/physiology ; Intercellular Junctions/physiology ; Models, Biological ; Mutation ; Oocytes/*cytology/physiology ; Ovary/cytology ; Stem Cells/*cytology/physiology ; Stromal Cells/cytology/physiology ; Transgenes
    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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    Perspectives: drug delivery. Regulating export of ER cargo (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aridor, M -- Balch, W E -- New York, N.Y. -- Science. 2000 Feb 4;287(5454):816-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Molecular Biology, Scripps Research Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10691557" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Cell Line ; Drug Delivery Systems ; Endoplasmic Reticulum/*metabolism/secretion ; Golgi Apparatus/metabolism ; Growth Hormone/chemistry/metabolism/secretion ; Immunophilins/chemistry/metabolism ; Insulin/chemistry/metabolism/secretion ; Ligands ; Mice ; Models, Biological ; Protein Conformation ; Protein Engineering ; Protein Folding ; Recombinant Fusion Proteins/*chemistry/*metabolism/secretion ; Tacrolimus 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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    Recovery and management options for spring/summer chinook salmon in the Columbia River basin (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-11-04
    Description: Construction of four dams on the lower Snake River (in northwestern United States) between 1961 and 1975 altered salmon spawning habitat, elevated smolt and adult migration mortality, and contributed to severe declines of Snake River salmon populations. By applying a matrix model to long-term population data, we found that (i) dam passage improvements have dramatically mitigated direct mortality associated with dams; (ii) even if main stem survival were elevated to 100%, Snake River spring/summer chinook salmon (Oncorhynchus tshawytscha) would probably continue to decline toward extinction; and (iii) modest reductions in first-year mortality or estuarine mortality would reverse current population declines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kareiva, P -- Marvier, M -- McClure, M -- New York, N.Y. -- Science. 2000 Nov 3;290(5493):977-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Marine Fisheries Service, Northwest Fisheries Science Center, 2725 Montlake Boulevard East, Seattle, WA 98112, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11062128" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Conservation of Natural Resources ; *Ecosystem ; Female ; Fresh Water ; Male ; Models, Biological ; Models, Statistical ; Northwestern United States ; Population Dynamics ; *Salmon/growth & development/physiology ; Survival Rate
    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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    Insect population control using a dominant, repressible, lethal genetic system (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-31
    Description: A major modification to the sterile insect technique is described, in which transgenic insects homozygous for a dominant, repressible, female-specific lethal gene system are used. We demonstrate two methods that give the required genetic characteristics in an otherwise wild-type genetic background. The first system uses a sex-specific promoter or enhancer to drive the expression of a repressible transcription factor, which in turn controls the expression of a toxic gene product. The second system uses non-sex-specific expression of the repressible transcription factor to regulate a selectively lethal gene product. Both methods work efficiently in Drosophila melanogaster, and we expect these principles to be widely applicable to more economically important organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thomas, D D -- Donnelly, C A -- Wood, R J -- Alphey, L S -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2474-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741964" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; Crosses, Genetic ; DNA-Binding Proteins ; *Drosophila Proteins ; Drosophila melanogaster/*genetics ; Egg Proteins/genetics ; Enhancer Elements, Genetic ; Fat Body/metabolism ; Female ; Gene Expression Regulation ; *Genes, Dominant ; *Genes, Insect ; *Genes, Lethal ; Genes, ras ; Homozygote ; Male ; Models, Biological ; Nuclear Proteins/genetics ; *Pest Control, Biological ; Promoter Regions, Genetic ; Tetracycline/pharmacology ; Trans-Activators/genetics ; Transcription Factors/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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    Neurobiology. A stargazer foretells the way to the synapse (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: How do AMPA receptors that are made in the cytoplasm of excitatory neurons travel to and become localized in the distant postsynaptic membranes of dendrites? Nakagawa and Sheng, in a Perspective, suggest that the answer may lie in the stargazin protein that has now been found to interact with AMPA receptors, guiding them to the postsynaptic membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakagawa, T -- Sheng, M -- New York, N.Y. -- Science. 2000 Dec 22;290(5500):2270-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11188726" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium Channels/chemistry/genetics/*metabolism ; Cell Membrane/metabolism ; Cerebellum/cytology/*metabolism ; Dendrites/metabolism ; Mice ; Mice, Mutant Strains ; Models, Biological ; Nerve Tissue Proteins/metabolism ; Neurons/*metabolism ; Protein Binding ; Protein Transport ; Receptors, AMPA/*metabolism ; Synapses/metabolism ; Synaptic Membranes/*metabolism ; Synaptic Transmission
    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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    Cell biology. Actin' up with Rac1 (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: The elegant architecture of photoreceptor cells in the retina is dependent on organization of the actin cytoskeleton during eye development. But what drives this organization? In an equally elegant Perspective, Colley explains new findings in fruit flies (Chang and Ready) that point to the photopigment rhodopsin and its signaling molecule the Rho GTPase Drac1 as the orchestrators of actin organization and the consequent assembly of the sensory membrane in the photoreceptor cell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Colley, N J -- R01 EY008768/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 8;290(5498):1902-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ophthalmology and Visual Sciences, University of Wisconsin, Madison, WI 53706, USA. njcolley@facstaff.wisc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11187046" target="_blank"〉PubMed〈/a〉
    Keywords: Actin Cytoskeleton/metabolism/*ultrastructure ; Amino Acid Motifs ; Animals ; Drosophila ; *Drosophila Proteins ; Enzyme Activation ; Humans ; Models, Biological ; Morphogenesis ; Photoreceptor Cells, Invertebrate/cytology/*growth & ; development/metabolism/*ultrastructure ; Retina/growth & development/ultrastructure ; Retinitis Pigmentosa/genetics/metabolism/pathology ; Rhodopsin/chemistry/*metabolism ; Signal Transduction ; rac GTP-Binding Proteins/*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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    Academic employment. UCSF researchers leave, charging bias (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 2000 Apr 7;288(5463):26-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10766628" target="_blank"〉PubMed〈/a〉
    Keywords: *Employment ; *Faculty ; Female ; Humans ; Mathematics ; Models, Biological ; *Prejudice ; Research ; *Universities
    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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