3,4-dihydroxybenzoate + NADH + 2 H(+) => 3,4-dihydroxybenzaldehyde + NAD(+) + H2O
3,4-dihydroxybenzoate + nadh + 2 h(+) => 3,4-dihydroxybenzaldehyde + nad(+) + h2o
3,4-dihydroxybenzoate + NADH + 2 H(+) => 3,4-dihydroxybenzaldehyde + NAD(+) + H2O
3,4-dihydroxybenzoate + nadh + 2 h(+) => 3,4-dihydroxybenzaldehyde + nad(+) + h2o