Reaction catalyzed by acyl-lipid omega-3 desaturase (cytochrome b5) (1.14.19.25)
+
2
+
+
2
=
+
2
+
2
H2O
arachidonic acid
+
2 ferrocytochrome b5
+
O2
+
2 H+
=
eicosapentaenoic acid
+
2 ferricytochrome b5
+
2 H2O
