1. Silk is made up of two proteins, fibroin and sericine. 2. It consists mainly of two proteins, fibroin and sericin. 3. :I guess you're talking about Fibroin . 4. Throughout the H-fibroin protein, greater than 60 % of all serines were phosphorylated. 5. Sericin C is the innermost layer, the layer that comes closest to and is adjacent to fibroin . 6. Also insoluble in water, sericin C can be separated from the fibroin via the addition of a hot, weak acid. 7. This kind of regular repetition and high glycine content is found in only a few other fibrous proteins, such as silk fibroin . 8. "Gonometa " fibroin is rich in basic amino acids, making it a potentially useful biomaterial in cell and tissue culture. 9. Many species of " Amycolatopsis " and " Saccharotrix " bacteria are able to degrade both silk fibroin and polylactic acid. 10. The cocoon, produced after the fourth moult, is covered with a continuous filament of the silk protein, fibroin , gummed together with sericin.
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