Source:http://linkedlifedata.com/resource/umls/id/C0022566
GO: The process in which the cytoplasm of the outermost cells of the vertebrate epidermis is replaced by keratin. Keratinization occurs in the stratum corneum, feathers, hair, claws, nails, hooves, and horns. [GOC:dph, GOC:ebc, GOC:sdb_2009, GOC:tb],CSP: development of or conversion into keratin.