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  • 1
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    Bison dispersal through the Ice Free Corridor [Ecology] (2016)
    National Academy of Sciences
    Details
    Publication Date: 2016-07-21
    Description: The Ice Free Corridor has been invoked as a route for Pleistocene human and animal dispersals between eastern Beringia and more southerly areas of North America. Despite the significance of the corridor, there are limited data for when and how this corridor was used. Hypothetical uses of the corridor include:...
    Keywords: Sackler Colloquium on In the Light of Evolution X: Comparative Phylogeography
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 2
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    Spider silk fibers spun from soluble recombinant silk produced in mammalian cells (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-01-19
    Description: Spider silks are protein-based "biopolymer" filaments or threads secreted by specialized epithelial cells as concentrated soluble precursors of highly repetitive primary sequences. Spider dragline silk is a flexible, lightweight fiber of extraordinary strength and toughness comparable to that of synthetic high-performance fibers. We sought to "biomimic" the process of spider silk production by expressing in mammalian cells the dragline silk genes (ADF-3/MaSpII and MaSpI) of two spider species. We produced soluble recombinant (rc)-dragline silk proteins with molecular masses of 60 to 140 kilodaltons. We demonstrated the wet spinning of silk monofilaments spun from a concentrated aqueous solution of soluble rc-spider silk protein (ADF-3; 60 kilodaltons) under modest shear and coagulation conditions. The spun fibers were water insoluble with a fine diameter (10 to 40 micrometers) and exhibited toughness and modulus values comparable to those of native dragline silks but with lower tenacity. Dope solutions with rc-silk protein concentrations 〉20% and postspinning draw were necessary to achieve improved mechanical properties of the spun fibers. Fiber properties correlated with finer fiber diameter and increased birefringence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lazaris, Anthoula -- Arcidiacono, Steven -- Huang, Yue -- Zhou, Jiang-Feng -- Duguay, Francois -- Chretien, Nathalie -- Welsh, Elizabeth A -- Soares, Jason W -- Karatzas, Costas N -- New York, N.Y. -- Science. 2002 Jan 18;295(5554):472-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Nexia Biotechnologies, Vaudreuil-Dorion, Quebec J7V 8P5, Canada. alazaris@nexiabiotech.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11799236" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Biopolymers ; Birefringence ; Cattle ; Cell Line ; Cloning, Molecular ; Cricetinae ; Culture Media, Conditioned ; DNA, Complementary ; Elasticity ; Epithelial Cells/metabolism ; *Fibroins ; Materials Testing ; Mechanics ; Molecular Sequence Data ; Molecular Weight ; *Protein Biosynthesis ; Protein Structure, Secondary ; Proteins/chemistry/*genetics/isolation & purification ; Recombinant Proteins/biosynthesis/chemistry/isolation & purification ; Solubility ; Spiders/*genetics/metabolism ; Stress, Mechanical ; Tensile Strength ; Water
    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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    Genomics of Drug Sensitivity in Cancer (GDSC): a resource for therapeutic biomarker discovery in cancer cells (2012)
    Oxford University Press
    Details
    Publication Date: 2012-12-20
    Description: Alterations in cancer genomes strongly influence clinical responses to treatment and in many instances are potent biomarkers for response to drugs. The Genomics of Drug Sensitivity in Cancer (GDSC) database ( www.cancerRxgene.org ) is the largest public resource for information on drug sensitivity in cancer cells and molecular markers of drug response. Data are freely available without restriction. GDSC currently contains drug sensitivity data for almost 75 000 experiments, describing response to 138 anticancer drugs across almost 700 cancer cell lines. To identify molecular markers of drug response, cell line drug sensitivity data are integrated with large genomic datasets obtained from the Catalogue of Somatic Mutations in Cancer database, including information on somatic mutations in cancer genes, gene amplification and deletion, tissue type and transcriptional data. Analysis of GDSC data is through a web portal focused on identifying molecular biomarkers of drug sensitivity based on queries of specific anticancer drugs or cancer genes. Graphical representations of the data are used throughout with links to related resources and all datasets are fully downloadable. GDSC provides a unique resource incorporating large drug sensitivity and genomic datasets to facilitate the discovery of new therapeutic biomarkers for cancer therapies.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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