Collagen vs. Keratin

Collagennoun

(biochemistry) Any of more than 28 types of glycoprotein that form elongated fibers, usually found in the extracellular matrix of connective tissue.

Collagennoun

The chemical basis of ordinary connective tissue, as of tendons or sinews and of bone. On being boiled in water it becomes gelatin or glue.

Collagennoun

a fibrous scleroprotein in bone and cartilage and tendon and other connective tissue; yields gelatin on boiling

Collagennoun

the main structural protein found in skin and other connective tissues, widely used in purified form for cosmetic surgical treatments

Collagen

Collagen () is the main structural protein in the extracellular matrix found in the body's various connective tissues. As the main component of connective tissue, it is the most abundant protein in mammals, making up from 25% to 35% of the whole-body protein content.

Keratinnoun

(protein) The protein of which hair and nails are composed.

Keratinnoun

A sulfur-containing fibrous protein constituting the main structural protein of hard epidermal tissues, such as horn, hair, feathers, nails, claws, hoofs, and the like. It is an insoluble substance, and, unlike elastin, is not dissolved even by gastric or pancreatic juice. By decomposition with sulphuric acid it yields leucine and tyrosine plus various other acid-stable amino acids. The amino acid composition varies, but it usually has a high percentage of cystine, which stabilizes and insolubilizes the protein by forming intrachain linkages. A softer form of keratin is present in the epidermis and whalebone. Called also epidermose.

Keratinnoun

a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair feathers nails and hooves

Keratinnoun

a fibrous protein forming the main structural constituent of hair, feathers, hoofs, claws, horns, etc.

Keratin

Keratin () is one of a family of fibrous structural proteins known as scleroproteins. α-Keratin is a type of keratin found in vertebrates.