Anti-Keratin 7 antibodies are used for the immunodetection of the protein encoded by the KRT7 gene. In humans, the canonical protein has a reported length of 469 amino acid residues and a mass of 51.4 kDa. Its subcellular localization is in the cytoplasm. It is reported to be expressed in cultured epidermal, bronchial and mesothelial cells but absent in colon, ectocervix and liver. It is a member of the Intermediate filament protein family. Post-translational modifications have been described, including methylation. Other names for this target antigen include K2C7, K7, SCL, keratin, type II cytoskeletal 7, CK-7, cytokeratin 7, keratin 7, type II, and CK7. Gene orthologs have been identified in the mouse, rat, bovine and chimpanzee species.