Reaction catalyzed by 5beta-cholestane-3alpha,7alpha-diol 12alpha-hydroxylase (1.14.14.139)
+
NADH
+
+
=
+
NAD+
+
H2O
7alpha-hydroxycholest-4-en-3-one
+
NADH
+
H+
+
O2
=
7alpha,12alpha-dihydroxycholest-4-en-3-one
+
NAD+
+
H2O
