a (8E,10E,12Z)-octadecatrienoyl-containing glycerolipid + A + 2 H2O => a (9Z,12Z)-octadecadienoyl-containing glycerolipid + AH2 + O2
a (8e,10e,12z)-octadecatrienoyl-containing glycerolipid + a + 2 h2o => a (9z,12z)-octadecadienoyl-containing glycerolipid + ah2 + o2