sterol 12-alpha-hydroxylase activity
Catalysis of the reaction: a steroid + reduced [NADPH--hemoprotein reductase] + O2 = a 12-alpha-hydroxysteroid + oxidized [NADPH--hemoprotein reductase]- H2O +H+.
GO:0008395
steroid hydroxylase activity
is_a
GO:0016712
oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen
is_a
cytochrome P450 CYP8B1
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