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