Reaction catalyzed by DELTA7-sterol 5(6)-desaturase (1.14.19.20)
+
+
+
=
+
+
2
H2O
5alpha-cholestan-3beta-ol
+
ferrocytochrome b5
+
H+
+
O2
=
cholest-5-en-3beta-ol
+
ferricytochrome b5
+
2 H2O
