1 ] [ edit ] GPD2 Mitochondrial glycerol-3-phosphate dehydrogenase (GPD2), catalyzes the irreversible oxidation of glycerol-3-phosphate to dihydroxyacetone phosphate and concomitantly transfers two electrons from FAD to the electron transport chain . GPD2 consists of 4 identical subunits. [ 10 ] X-ray structure of glycerol-3-phosphate dehydrogenase from Bacilius halodurans complexed with