Reaction catalyzed by acyl-CoA (8-3)-desaturase (1.14.19.44)
+
2
+
+
2
=
+
2
+
2
H2O
(8Z,11Z,14Z)-icosa-8,11,14-trienoyl-CoA
+
2 ferrocytochrome b5
+
O2
+
2 H+
=
arachidonoyl-CoA
+
2 ferricytochrome b5
+
2 H2O