BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Keratins are a family of fibrous structural proteins that belong to the scleroprotein groups found in feathers, wool, horns, hooves, nails, claws, beaks, and hair of animals.

Detailed explanation-2: -Keratinocytes (ker-uh-TIH-no-sites) make keratin, a type of protein that’s a basic component of hair, skin, and nails. Keratin in the skin’s outer layer helps create a protective barrier.

Detailed explanation-3: -Apart from being the principal constituent of the stratum corneum of human and animal skin, keratins are also found in exoskeletal materials such as horns, hooves, hair, feathers, wool and nails (Aluigi et al.

Detailed explanation-4: -Mature feathers of extant birds are primarily composed of -keratins, a family of proteins found only in birds and reptiles (15).

Detailed explanation-5: -Alpha-keratins (-keratins) are found in all vertebrates. They form the hair (including wool), the outer layer of skin, horns, nails, claws and hooves of mammals, and the slime threads of hagfish. The baleen plates of filter-feeding whales are also made of keratin.