Ready-to-use ELISA kits are available for the detection of COL2, an alias of the protein, collagen type II alpha 1 chain. The official gene symbol is COL2A1. The kits can detect several species variants of the protein, including: human, mouse, rat, bovine, and chicken. The protein, with a mass of 141.8 kDa and length of 1487 residues, is reported to be secreted. It is a member of the Fibrillar collagen family and may be known by other names, including: collagen type II alpha 1, collagen II alpha-1 polypeptide, cartilage collagen, alpha-1 type II collagen, and collagen alpha-1(II) chain, and AOM.