3,4-dihydroxyphenylacetate + O2 = 2-hydroxy-5-carboxymethylmuconate semialdehyde + H(+)
3,4-dihydroxyphenylacetate + o2 = 2-hydroxy-5-carboxymethylmuconate semialdehyde + h(+)
"homoprotocatechuate 2,3-dioxygenase"
"homoprotocatechuate 2,3-dioxygenase"