The mitochondrial OGDH complex catalyzes the reaction of 2-oxoglutarate, coA-SH, and NAD+ to form succinyl-CoA, CO2, andNADH + H+. Putative rice OGDH E1, E2, and E3 subunit proteins have been identified based on sequence similarity with Arabidopsis thaliana orthologues. The stoichiometry of the rice complex is unknown.