CK5, or Keratin 5, type II, is a human gene encoded by KRT5. It may also be known as: Keratin, type II cytoskeletal 5; 58 kDa cytokeratin; Cytokeratin-5; CK-5; Keratin-5; Type-II keratin Kb5; DDD; DDD1; EBS2; K5; KRT5A. The encoded protein has an amino acid length of 590 and a mass of 62.4 kDa. CK5 is a member of the Intermediate filament family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Chicken.