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Three-Layered Sericins around the Silk Fibroin Fiber from Bombyx mori Cocoon and their Amino Acid Composition by Wang, Yuan Jing; Zhag, Yu Qing is a Engineering article available to read on EtoBox.

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The sericin coated around silk fibroin fiber is a natural protein-based polymer and presents a layered structure. According to the solubility in water under different temperatures and pressures, the sericin is divided into three parts of outer, middle and inner sericin layers accounting for 15%, 10.5% and 4.5% to the total silk protein (included sericin layers and fibroin fiber) in terms of the mass respectively. The partition within the sericin layer presents the relative proportions of 50%, 35% and 15% from the outer to inner layer. Furthermore, the differences of three layers in the amino acid composition are very significant. The non-polar amino acids in the outer, middle and inner sericins are gradually increased, in particular for alanine, which are accounted for 5.20, 6.13 and 11.58 mol% respectively; while its content jumps to 33.38 mol% in the silk fibroin fiber. Nevertheless, the polar amino acids, especially the neutral ones, are gradually decreased accounting for 39.34, 38.62 and 23.82 mol% respectively. Concentration of Serine drops most prominently, i.e. 28.00, 25.57 and 13.32 mol% respectively; while its content goes to 7.65 mol% in the silk fibroin fiber. On the oth

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Author

Wang, Yuan Jing; Zhag, Yu Qing

Publisher

Trans Tech Publications, Ltd.; Trans Tech Publications (ISSN 1662-8958)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)