Reaction catalyzed by cholesterol 7-desaturase (1.14.19.21)
+
+
NADPH
+
=
+
NADP+
+
H2O
stigmasterol
+
O2
+
NADPH
+
H+
=
(3beta,22E)-stigmasta-5,7,22-trien-3-ol
+
NADP+
+
H2O
