(1) isocitrate@mitochondrial matrix+H_super_+_endsuper_@mitochondrial matrix+NADP_super_+_endsuper_@mitochondrial matrix - IDH2:Mg_super_2+_endsuper_@mitochondrial matrix -> 2-oxoglutarate@mitochondrial matrix+CO_sub_2_endsub_@mitochondrial matrix+NADPH@mitochondrial matrix
accepts also oxalosuccinate as a substrate