Enzymatic reactions [BR:br08201]
1. Oxidoreductase reactions
1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
1.14.19 With oxidation of a pair of donors resulting in the reduction of O2 to two molecules of water
1.14.19.10
R10926 Eicosanoyl-CoA + Ferrocytochrome b5 + Oxygen + 2 H+ <=> (Z)-Icos-5-enoyl-CoA + Ferricytochrome b5 + 2 H2O