1. It consists mainly of two proteins, fibroin and sericin . 2. Sericin has also been used in medicine and cosmetics.3. The cocoons are first boiled to loosen the sericin holding the filaments together and remove the silkworm. 4. Sericin C also contains the amino acids present in B, along with the addition of proline.5. Sericin C is the innermost layer, the layer that comes closest to and is adjacent to fibroin.6. They spin their cocoon around themselves by extruding liquid silk that's covered with a tacky sealant called sericin . 7. There are also three different types of sericin , which make up the layers found on top of the fibrin. 8. Sericin B, composed the middle layer and is nearly the same as sericin A, but also contains tryptophan.9. Sericin B, composed the middle layer and is nearly the same as sericin A, but also contains tryptophan. 10. Liquid silk is coated in sericin , a water-soluble protective gum, and solidifies on contact with the air.
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