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  • 1
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    Circadian rhythms. A time to rest: clock signal identified (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2453.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752547" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Clocks/physiology ; Circadian Rhythm/drug effects/*physiology ; Cricetinae ; Darkness ; Hypothalamus/*metabolism ; Light ; Mice ; *Motor Activity/drug effects ; Mutation ; Neurons/*metabolism ; Receptor, Epidermal Growth Factor/genetics/*metabolism ; Retinal Ganglion Cells/metabolism ; Signal Transduction ; Suprachiasmatic Nucleus/*metabolism ; Transforming Growth Factor alpha/*metabolism/pharmacology
    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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    Molecular evolution. Genome duplications: the stuff of evolution? (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2458-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752552" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; *Evolution, Molecular ; Fishes/genetics ; Gene Dosage ; *Gene Duplication ; *Genome ; Genome, Human ; Genomics ; Humans ; Invertebrates/genetics ; Multigene Family ; Polyploidy ; Vertebrates/genetics
    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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  • 3
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    Control of stem cell self-renewal in Drosophila spermatogenesis by JAK-STAT signaling (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: Stem cells, which regenerate tissue by producing differentiating cells, also produce cells that renew the stem cell population. Signals from regulatory microenvironments (niches) are thought to cause stem cells to retain self-renewing potential. However, the molecular characterization of niches remains an important goal. In Drosophila testes, germ line and somatic stem cells attach to a cluster of support cells called the hub. The hub specifically expresses Unpaired, a ligand activating the JAK-STAT (Janus kinase-signal transducer and activator of transcription) signaling cascade. Without JAK-STAT signaling, germ line stem cells differentiate but do not self-renew. Conversely, ectopic JAK-STAT signaling greatly expands both stem cell populations. We conclude that the support cells of the hub signal to adjacent stem cells by activation of the JAK-STAT pathway, thereby defining a niche for stem cell self-renewal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tulina, N -- Matunis, E -- R01 HD040307/HD/NICHD NIH HHS/ -- R01HD40307/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2546-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Embryology, Carnegie Institution of Washington, 115 West University Parkway, Baltimore, MD 21210, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752575" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Lineage ; Cell Survival ; Contractile Proteins/analysis ; DNA-Binding Proteins/genetics/*metabolism ; Drosophila/cytology/genetics/*physiology ; Drosophila Proteins/genetics/*metabolism ; Gene Expression ; Germ Cells/cytology/*physiology ; Glycoproteins/genetics/*metabolism ; Insect Proteins/genetics/metabolism ; Janus Kinases ; Ligands ; Male ; Microscopy, Confocal ; Mutation ; Protein-Tyrosine Kinases/genetics/*metabolism ; STAT Transcription Factors ; Signal Transduction ; Spermatogenesis ; Spermatogonia/physiology ; Stem Cells/cytology/*physiology ; Testis/cytology/metabolism ; Trans-Activators/genetics/*metabolism ; *Transcription Factors
    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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    Independent and redundant information in nearby cortical neurons (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: In the primary visual cortex (V1), nearby neurons are tuned to similar stimulus features, and, depending on the manner and time scale over which neuronal signals are analyzed, the resulting redundancy may mitigate deleterious effects of response variability. We estimated information rates in the short-time scale responses of clusters of up to six simultaneously recorded nearby neurons in monkey V1. Responses were almost independent if we kept track of which neuron fired each spike but were redundant if we summed responses over the cluster. Redundancy was independent of cluster size. Summing neuronal responses to reduce variability discards potentially useful information, and the discarded information increases with cluster size.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reich, D S -- Mechler, F -- Victor, J D -- EY07138/EY/NEI NIH HHS/ -- EY9314/EY/NEI NIH HHS/ -- GM07739/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2566-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Biophysics, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA. reichd@rockefeller.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752580" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Brain Mapping ; Haplorhini ; Nerve Net/physiology ; Neurons/*physiology ; Retinal Ganglion Cells/physiology ; Visual Cortex/*physiology
    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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  • 5
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    Development. Nota bene: a SAC of crumbs and stardust (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, O -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2498.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752566" target="_blank"〉PubMed〈/a〉
    Keywords: Adherens Junctions/metabolism/ultrastructure ; Animals ; Cell Membrane/metabolism ; *Cell Polarity ; Dendrites/metabolism ; Drosophila/cytology/embryology ; Drosophila Proteins/*metabolism ; Embryo, Nonmammalian/cytology ; *Embryonic Development ; Epithelial Cells/*physiology/ultrastructure ; Guanylate Kinase ; Intercellular Junctions/metabolism/ultrastructure ; Membrane Proteins/*metabolism ; *Membrane Transport Proteins ; Neurons, Afferent/metabolism ; Nucleoside-Phosphate Kinase/*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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  • 6
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    In silico mapping of mouse quantitative trait loci (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chesler, E J -- Rodriguez-Zas, S L -- Mogil, J S -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2423.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology and, Neuroscience Program, University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752534" target="_blank"〉PubMed〈/a〉
    Keywords: *Algorithms ; Animals ; Chromosome Mapping/*methods ; Genetic Linkage ; Genotype ; Mice ; Mice, Inbred Strains ; Phenotype ; Polymorphism, Single Nucleotide ; *Quantitative Trait, Heritable ; Statistics as Topic
    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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  • 7
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    Development. Staying a boy forever (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wasserman, S A -- DiNardo, S -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2495-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Molecular Genetics, Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA 92093-0634, USA. stevenw@ucsd.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752564" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Aging ; Cell Division ; Cell Nucleus/metabolism ; Drosophila/cytology/embryology/physiology ; Drosophila Proteins/*metabolism ; Germ Cells/cytology/metabolism/*physiology ; Glycoproteins/*metabolism ; Ligands ; Male ; Phosphorylation ; Protein-Tyrosine Kinases/*metabolism ; Signal Transduction ; Spermatids/cytology/physiology ; Spermatogenesis ; Stem Cells/cytology/metabolism/*physiology ; Testis/cytology ; Transcription Factors/*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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  • 8
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    Climate change. Greenhouse gas mitigation in U.S. agriculture and forestry (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCarl, B A -- Schneider, U A -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2481-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Agricultural Economics, Texas A&M University, College Station, TX 77843-2124, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752558" target="_blank"〉PubMed〈/a〉
    Keywords: *Agriculture/economics ; Animals ; *Carbon ; *Carbon Dioxide ; Climate ; Conservation of Natural Resources/economics ; Costs and Cost Analysis ; Crops, Agricultural/economics ; Fertilizers ; *Forestry/economics ; Greenhouse Effect ; Models, Theoretical ; Soil ; Trees ; United States
    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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  • 9
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    Breakthrough of the year. Scorecard 2000 (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 2001 Dec 21;294(5551):2445.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752540" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Body Patterning ; Communicable Diseases ; Elementary Particles ; Gene Silencing ; Humans ; Oceanography ; Rna ; *Research ; Research Support as Topic ; *Science ; 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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  • 10
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    Breakthrough of the year. The runners-up (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 2001 Dec 21;294(5551):2443-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752538" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/therapeutic use ; Axons/physiology ; Benzamides ; Carbon ; Climate ; Ecosystem ; Electronics ; Genome, Human ; Humans ; Imatinib Mesylate ; Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy ; Physical Phenomena ; Physics ; Piperazines/therapeutic use ; Pyrimidines/therapeutic use ; Rna ; *Research ; *Science
    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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