Reaction catalyzed by 4beta-methylsterol monooxygenase (1.14.13.246)
a 3beta-hydroxy-4beta-hydroxymethyl-4alpha-methylsteroid
+
NADH
+
+
=
a 3beta-hydroxy-4beta-formyl-4alpha-methylsteroid
+
NAD+
+
2
H2O
a 3beta-hydroxy-4beta-hydroxymethyl-4alpha-methylsteroid
+
NADH
+
H+
+
O2
=
a 3beta-hydroxy-4beta-formyl-4alpha-methylsteroid
+
NAD+
+
2 H2O
