3,4-dihydroxybenzoate + O2 = 4-carboxy-2-hydroxy-cis,cis-muconate 6-semialdehyde + H(+)
3,4-dihydroxybenzoate + o2 = 4-carboxy-2-hydroxy-cis,cis-muconate 6-semialdehyde + h(+)
"protocatechuate 4,5-dioxygenase"
"protocatechuate 4,5-dioxygenase"