"110563018"@en-us . "ceratin"@en-us . . . "a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves"@en-us . . . . "a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves"@en-us . . . "0"^^ . "114732472"^^ . . "keratin"^^ . . . "keratin"@en-us . . . . . "113890985"@en-us . . "0"^^ . "14732472-n"^^ .