- Types:
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collagen
a fibrous scleroprotein in bone and cartilage and tendon and other connective tissue; yields gelatin on boiling
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elastin
a fibrous scleroprotein found in elastic tissues such as the walls of arteries
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gelatin, gelatine
a colorless water-soluble glutinous protein obtained from animal tissues such as bone and skin
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chondrin
a substance that resembles gelatin and is obtained by boiling cartilage in water
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ceratin, keratin
a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves