Ready-to-use ELISA kits are available for the detection of K6irs, an alias of the protein, keratin 72. The official gene symbol is KRT72. The protein has a mass of 55.9 kDa and length of 511 residues. It is a member of the Intermediate filament family and may be known by other names, including: keratin protein K6irs, keratin 72 type II, cytokeratin-72, K72, CK-72, and keratin type II cytoskeletal 72, and type-II keratin Kb35.