keratin definition

  • noun:
    • A tough, insoluble protein compound this is the primary structural constituent of tresses, fingernails, horns, and hooves.
    • A protein which hair and fingernails tend to be comprised of.
    • A sulfur-containing fibrous necessary protein constituting the main architectural necessary protein of hard epidermal cells, such as for instance horn, tresses, feathers, fingernails, claws, hoofs, and so on. It is an insoluble material, and, unlike elastin, is certainly not mixed even by gastric or pancreatic liquid. By decomposition with sulphuric acid it yields leucine and tyrosine plus some other acid-stable proteins. The amino acid structure differs, nonetheless it often features increased portion of cystine, which stabilizes and insolubilizes the necessary protein by developing intrachain linkages. A softer form of keratin occurs when you look at the skin and whalebone. Called in addition epidermose.
    • just like ceratin.

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