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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. Access through your
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March 2022 REFERENCES * Schroeder, W. A., and Kay, L. M., _J. Amer. Chem. Soc._, 77, 3908 (1955). Article CAS Google Scholar * Zuber, H., Ziegler, K., and Zahn, H., _Z. Naturforsch._,
126, 734 (1957). Article Google Scholar * Speakman, J. B., _J. Text. Inst._, 51, P, 392 (1960). Article Google Scholar * Howitt, F. O., _J. Text. Inst._, 51, P, 238 (1960). Article
Google Scholar * Burgess, A. F., British Patent 563,745 (1944). Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department of Textile Industries, Institute of Technology,
Bradford C. EARLAND & D. J. RAVEN Authors * C. EARLAND View author publications You can also search for this author inPubMed Google Scholar * D. J. RAVEN View author publications You can
also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE EARLAND, C., RAVEN, D. Isolation of a Cystine
Derivative from Silk. _Nature_ 192, 1185–1186 (1961). https://doi.org/10.1038/1921185b0 Download citation * Issue Date: 23 December 1961 * DOI: https://doi.org/10.1038/1921185b0 SHARE THIS
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