Reaction catalyzed by steroid 9alpha-monooxygenase (1.14.99.24)
+
NADH
+
=
+
NAD+
+
H2O
4-androstene-3,17-dione
+
NADH
+
O2
=
9alpha-hydroxy-4-androstene-3,17-dione
+
NAD+
+
H2O
