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Sericin

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Sericin 

(also silk gum), a viscous protein of natural silk constituting approximately one-third of the silk’s weight. It is characterized by a high content of the amino acid serine (up to 40 percent). Sericin cements the filaments of fibroin, the other protein of silk. In contrast to fibroin, sericin is soluble in hot water and alkaline solutions.



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Then they dumped the cocoons into boiling water to remove the sericin and loosen the filament.
To form the devices, Tufts scientists boiled cocoons of the Bombyx mori silkworm in a water solution and extracted the glue-like sericin proteins.
The silkworm encases its two main silk proteins in a coat of sericin, a gluelike protein that seals the cocoon together, when used as sutures or for other medical applications, this sericin glue can provoke an immune response in people and therefore must be coated over or removed.
 
 
 
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