(S)-oxalosuccinate + H(+) <=> 2-oxoglutarate + CO2
(s)-oxalosuccinate + h(+) <=> 2-oxoglutarate + co2
(S)-oxalosuccinate + H(+) <=> 2-oxoglutarate + CO2
(s)-oxalosuccinate + h(+) <=> 2-oxoglutarate + co2