A sulphur-containing protein which is a major component in skin, hair, nails, hooves, horns, and teeth.
A class of fibrous proteins or scleroproteins important both as structural proteins and as keys to the study of protein conformation. The family represents the principal constituent of epidermis, hair, nails, horny tissues, and the organic matrix of tooth enamel. Two major conformational groups have been characterized, alpha-keratin, whose peptide backbone forms an alpha-helix, and beta-keratin, whose backbone forms a zigzag or pleated sheet structure.
Hard, fibrous protein that is the primary constituent of hair and nails.
A hard protein substance found in hair, nails, and skin.
An insoluble substance that forms the basis of horns, nails, and hoofs.
A multigene family of approximately 30 proteins that form the intermediate filaments of the epithelial cell cytoskeleton.
Insoluble protective or structural proteins consisting of parallel polypeptide chains arranged in an α-helical or /β conformation.
A protein found in horny tissue such as fingernails, hair or the outer surface of the skin.
A fibrous protein forming the main structural constituent of healthy hair. It can also be found in deep conditioners because dry and damaged hair has typically lost a lot of keratin and deep conditioners restore that lost health.
A scleroprotein found primarily in fingernails, hair, horns, and so on; contains a large amount of sulfur.
Protein that forms horny tissues such as the nails and is also found in the outer skin and hair.
Protein associated with hair and nails; oily secretion pertaining to hair follicles and sebaceous glands.
A fibrous protein that is the major component of the epidermis (the outermost layer of skin) and of the nails and hair. Keratin acts as a protective barrier against harmful environmental influences.
A fibrous protein that forms the body’s horny tissues, such as fingenails. It is also found in the skin and hair.
The substance of which horn and the surface layer of the skin are composed.
A family of durable protein polymers that are found only in epithelial cells. They provide structural strength to skin, hair, and nails. The fibrous protein is produced by keratinocytes and may be hard or soft.
Fibrous protein of cells that is also the principal component of hair and nails.
A fibrous, sulfur-containing protein found in human skin, hair, nails, and tooth enamel.