Abstract
CONSIDERABLE doubt exists as to whether silk fibroin (Bombyx mori) contains a small amount of cystine or whether this amino-acid is entirely absent. Apart from any biological significance, even a very small quantity of cystine, depending on its mode of incorporation, could have a considerable influence on the molecular weight of fibroin.
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EARLAND, C., RAVEN, D. Isolation of a Cystine Derivative from Silk. Nature 192, 1185–1186 (1961). https://doi.org/10.1038/1921185b0
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DOI: https://doi.org/10.1038/1921185b0
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