Journal
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
Volume 14, Issue 1-2, Pages 41-46Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0928-4931(01)00207-7
Keywords
silk fibroin; fibroin dissolution; molecular weight; SDS-PAGE
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The molecular mass of solubilized fibroin prepared from silk was analyzed by SDS-PAGE. It was found that the fibroin molecule was degraded during reeling, degumming (removal of sericin), and dissolution of silk threads. A protocol for the preparation of solubilized fibroin conserving its native molecular size is offered, that is, (1) to use only fresh cocoons (not dry cocoons or reeled silk threads), (2) to degum by heating in 8 M aqueous urea, and (3) to dissolve by saturated (similar to 9 M) aqueous lithium thiocyanate at room temperature. (C) 2001 Elsevier Science B.V. All rights reserved.
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