(3E)-2-oxohex-3-enedioate + H(+) => 2-oxopent-4-enoate + CO2
(3e)-2-oxohex-3-enedioate + h(+) => 2-oxopent-4-enoate + co2
(3E)-2-oxohex-3-enedioate + H(+) => 2-oxopent-4-enoate + CO2
(3e)-2-oxohex-3-enedioate + h(+) => 2-oxopent-4-enoate + co2