Term Name:	steroid 21-monooxygenase activity
Synonyms:	21-hydroxylase activity, cytochrome P450 CYP21A1, cytochrome p450 XXIA1 activity, steroid 21-hydroxylase activity, steroid,hydrogen-donor:oxygen oxidoreductase (21-hydroxylating)
Definition:	Catalysis of the reaction: A C(21) steroid + [reduced NADPH--hemoprotein reductase] + O2 = a 21-hydroxy-C(21)-steroid + [oxidized NADPH--hemoprotein reductase] + H2O.
Ontology:	GO: Molecular Function [GO:0004509]    QuickGO    AmiGO