dihydroxyfumarate + H(+) = 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