hair keratin

Keratin. comon hair Keratin ( / ˈkɛrətɪn / [1] [2]) is one of a family of structural fibrous proteins also known as scleroproteins. comon hair Alpha-keratin (α-keratin) is a type of keratin found in vertebrates It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, and the outer layer of skin among vertebrates