Compound as reactive (1)

2-(4-hydroxyphenyl)-2-oxoacetate + H⁺ → 4-hydroxybenzaldehyde + CO₂

Compound as product (2)

an oxidized electron donor + (S)-4-hydroxymandelate → a reduced electron donor + 2-(4-hydroxyphenyl)-2-oxoacetate

(S)-4-hydroxymandelate + oxygen → hydrogen peroxide + 2-(4-hydroxyphenyl)-2-oxoacetate

Reversible reaction (1)

2-oxoglutarate + D-(4-hydroxyphenyl)glycine ↔ 2-(4-hydroxyphenyl)-2-oxoacetate + L-glutamate