e/Keratin 21

Information
has gloss	eng: Keratin 21 is a type I cytokeratin which expresses immunologically specific fusion protein. It is not found in humans, but only in Rattus norvegicus.
lexicalization	eng: Keratin 21
instance of	(noun) a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves keratin, ceratin