Human Steroid 21-hydroxylase,CYP21B ELI
3,140.00 ₪
A cytochrome P450 monooxygenase that plays a major role in adrenal steroidogenesis.
Catalyzes the hydroxylation at C-21 of progesterone and 17alpha-hydroxyprogesterone to respectively form 11-deoxycorticosterone and 11-deoxycortisol, intermediate metabolites in the biosynthetic pathway of mineralocorticoids and glucocorticoids (PubMed:25855791, PubMed:10602386, PubMed:16984992, PubMed:22014889, PubMed:27721825).
Mechanistically, uses molecular oxygen inserting one oxygen atom into a substrate, and reducing the second into a water molecule, with two electrons provided by NADPH via cytochrome P450 reductase (CPR; NADPH-ferrihemoprotein reductase) (PubMed:25855791).
{ECO:0000269|PubMed:10602386, ECO:0000269|PubMed:16984992, ECO:0000269|PubMed:22014889, ECO:0000269|PubMed:25855791, ECO:0000269|PubMed:27721825}.
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