Collagen alpha 2IV chain, Canstatin, COL4A 2, COL4A2, Collagen, type IV, alpha 2, CO4A2_HUMAN.
CO4A2 is one of the six subunits of type IV collagen, the major structural component of basement membranes. CO4A2 fors a chicken-wire meshwork together with laminins, proteoglycans and entactin/nidogen and is an inhibitor of angiogenesis and tumor growth.