Fibroin is an insoluble protein created by spiders, the larvae of Bombyx mori, other moth genera such as Antheraea, Cricula, Samia and Gonometa, and numerous other insects. Silk in its raw state consists of two main proteins, sericin and fibroin, with a glue-like layer of sericin coating two singular filaments of fibroin called brins. The fibroin ...
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http://en.wikipedia.org/wiki/Fibroin
• (n.) A variety of gelatin; the chief ingredient of raw silk, extracted as a white amorphous mass.
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http://thinkexist.com/dictionary/meaning/fibroin/
(from the article `scleroprotein`) The two most important classes of scleroproteins are the collagens and the keratins. Others include fibroin, which forms about 67 percent of the ... ...substance is produced by mites, pseudoscorpions, and some crustaceans (ostracods and amphipods), only the spiders are true silk specialists. ... The...
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http://www.britannica.com/eb/a-z/f/21
<biology> Structural protein of silk, one of the first to be studied with X-ray diffraction. It has a repeat sequence GSGAGA and is unusual in that it consists almost entirely of stacked antiparallel _ pleated sheets. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973
Structural protein of silk, one of the first to be studied with X-ray diffraction. It has a repeat sequence GSGAGA and is unusual in that it consists almost entirely of stacked antiparallel beta pleated sheets.
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Fi'bro·in noun [ Latin
fibra a fiber.]
(Chemistry) A variety of gelatin; the chief ingredient of raw silk, extracted as a white amorphous mass.
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http://www.encyclo.co.uk/webster/F/25
Type: Term Pronunciation: fī′brō-in Definitions: 1. A white, insoluble (27.6 kDa) protein forming the primary constituent (70%) of cobweb and silk.
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http://www.medilexicon.com/medicaldictionary.php?t=33145
Fibroin (Fibrosin) is a tough, elastic, albuminoid protein which forms over 50 percent of silk and spider's web.
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http://www.probertencyclopaedia.com/browse/GF.HTM
an indigestible protein that is a principal component of spider webs and silk.
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https://www.infoplease.com/dictionary/fibroin
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