keratin

keratin
keratin ker"a*tin, n. [Gr. ke`ras, -atos, horn.] (Physiol. Chem.) 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}. [1913 Webster +PJC]

The Collaborative International Dictionary of English. 2000.

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  • Keratin 14 — Identifiers Symbols KRT14; CK14; EBS3; EBS4; K14; NFJ External IDs OMIM …   Wikipedia

  • Keratin 10 — Identifiers Symbols KRT10; BCIE; BIE; CK10; EHK; K10; KPP External IDs OM …   Wikipedia

  • Keratin 19 — Identifiers Symbols KRT19; CK19; K19; K1CS; MGC15366 External IDs OMIM …   Wikipedia

  • Keratin 18 — Identifiers Symbols KRT18; CYK18; K18 External IDs OMIM …   Wikipedia

  • Keratin 5 — is a keratin protein often paired with keratin 14. PBB Summary section title = summary text = The protein encoded by this gene is a member of the keratin gene family. The type II cytokeratins consist of basic or neutral proteins which are… …   Wikipedia

  • Keratin 8 — Identifiers Symbols KRT8; CARD2; CK8; CYK8; K2C8; K8; KO External IDs OMIM …   Wikipedia

  • Keratin 1 — is a member of the keratin family. It is specifically expressed in the spinous and granular layers of the epidermis with family member keratin 10. Mutations in this gene have been associated with the variants of bullous congenital ichthyosiform… …   Wikipedia

  • Keratin 7 — Identifiers Symbols KRT7; CK7; K2C7; K7; MGC129731; MGC3625; SCL External IDs …   Wikipedia

  • Keratin 17 — Keratin 17, also known as KRT17, is a human gene.cite web | title = Entrez Gene: KRT17 keratin 17| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene Cmd=ShowDetailView TermToSearch=3872| accessdate = ] Keratin 17 is a type I cytokeratin. It… …   Wikipedia

  • Keratin 4 — Identifiers Symbols KRT4; CK 4; CK4; CYK4; FLJ31692; K4 External IDs OMIM …   Wikipedia

  • Keratin 13 — Identifiers Symbols KRT13; CK13; K13; MGC161462; MGC3781 External IDs OMI …   Wikipedia

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