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A P-450 heme-thiolate protein responsible for the conversion of progesterone and 17alpha-hydroxyprogesterone to their respective 21-hydroxylated derivatives, 11-deoxycorticosterone and 11-deoxycortisol. Involved in the biosynthesis of the hormones aldosterone and cortisol. The electron donor is EC 18.104.22.168, NADPH---hemoprotein reductase.
17alpha-hydroxyprogesterone 21-hydrolase, 21-hydroxylase, 21-hydroxylase cytochrome P-450, 21OH, C3B21RA protein, CYP21, CYP21A2, CYP2D, Cytochrome P-450 specific for steroid C-21 hydroxylation, cytochrome P-450-linked mixed function oxidase system, more