2-hydroxy-3-oxopropanoate + CO2 => dihydroxyfumarate + H(+)
2-hydroxy-3-oxopropanoate + co2 => dihydroxyfumarate + h(+)
2-hydroxy-3-oxopropanoate + CO2 => dihydroxyfumarate + H(+)
2-hydroxy-3-oxopropanoate + co2 => dihydroxyfumarate + h(+)