CK15, or Keratin 15, type I, is a human gene encoded by KRT15. It may also be known as: Keratin, type I cytoskeletal 15; Cytokeratin-15; CK-15; Keratin-15; K15; keratin-15, basic; keratin-15, beta; type I cytoskeletal 15; cytokeratin 15; K1CO. The encoded protein has an amino acid length of 456 and a mass of 49.2 kDa. CK15 is a member of the Intermediate filament family. Homologs of this gene exist in other organisms, including: Mouse, Zebrafish, Chicken.