Collagen IV (Collagen Alpha-1(IV) Chain, Collagen IV Alpha 1 Polypeptide, Collagen Type IV Alpha 1, COL4A1, Collagen Alpha-2(IV) Chain, Collagen IV Alpha 2 Polypeptide, Collagen Type IV Alpha 2, COL4A2, Collagen alpha-3(IV) Chain, Collagen Type IV Alpha 3