CK13, or Keratin 13, type I, is a human gene encoded by KRT13. It may also be known as: Keratin, type I cytoskeletal 13; Cytokeratin-13; CK-13; Keratin-13; cytokeratin 13; WSN2. The encoded protein has an amino acid length of 458 and a mass of 49.6 kDa. CK13 is a member of the Intermediate filament family. Homologs of this gene exist in other organisms, including: Mouse.