ID 1.14.99.10 DE Steroid 21-monooxygenase. AN Cytochrome p450 XXIA1. AN Steroid 21-hydroxylase. CA A steroid + AH(2) + O(2) = a 21-hydroxysteroid + A + H(2)O. CF Heme-thiolate. CC -!- Formerly EC 1.14.1.8 and EC 1.99.1.11. PR PROSITE; PDOC00081; DR P00191, CP21A_BOVIN; Q8WNW0, CP21A_CANFA; Q2LCM1, CP21A_CANLU; DR Q2LA60, CP21A_FELCA; P08686, CP21A_HUMAN; Q2LA59, CP21A_LYNLY; DR P03940, CP21A_MOUSE; P15540, CP21A_PIG ; Q64562, CP21A_RAT ; //