期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 27, 期 3, 页码 205-210出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0141-8130(00)00124-0
关键词
Nephila edulis; Congo Red; drawing; fibers; phase separation; protein folding
Spider dragline silk is formed as the result of a remarkable transformation in which an aqueous dope solution is rapidly converted into an insoluble protein filament with outstanding mechanical properties. Microscopy on the spinning duct in Nephila edulis spiders suggests that this transformation involves a stress-induced formation of anti-parallel beta-sheets induced by extensional flow. Measurements of draw stress at different draw rates during silking confirm that a stress-induced phase transition occurs. (C) 2000 Elsevier Science B.V. All rights reserved.
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