label: (9Z,12Z,15Z)-octadecatrienoyl-containing glycerolipid + 2 Fe(II)-[cytochrome b5] + O2 + 2 H(+) => a (9Z,11E,13E,15Z)-octadecatetraenoyl-containing glycerolipid + 2 Fe(III)-[cytochrome b5] + 2 H2O
label_lc: (9z,12z,15z)-octadecatrienoyl-containing glycerolipid + 2 fe(ii)-[cytochrome b5] + o2 + 2 h(+) => a (9z,11e,13e,15z)-octadecatetraenoyl-containing glycerolipid + 2 fe(iii)-[cytochrome b5] + 2 h2o