KEGG:R07933

(9Z,12Z,15Z)-Octadecatrienoyl-CoA + 2 Ferrocytochrome b5 + Oxygen + 2 H+ <=> (6Z,9Z,12Z,15Z)-Octadecatetraenoyl-CoA + 2 Ferricytochrome b5 + 2 H2O