Compound as reactive (1)

(S)-4-hydroxy-2-oxopentanoate ← H₂O + (2Z)-2-hydroxypenta-2,4-dienoate

Compound as product (9)

2-hydroxy-6-oxo-nona-2,4-dienoate + H₂O → butanoate + H⁺ + (2Z)-2-hydroxypenta-2,4-dienoate

(3E)-2-oxohex-3-enedioate + H⁺ → (2Z)-2-hydroxypenta-2,4-dienoate + CO₂

H₂O + (2Z,4E)-2-hydroxy-5-methyl-6-oxohexa-2,4-dienoate → acetate + H⁺ + (2Z)-2-hydroxypenta-2,4-dienoate

H₂O + (2Z,4E,7E)-2-hydroxy-6-oxonona-2,4,7-triene-1,9-dioate → H⁺ + fumarate + (2Z)-2-hydroxypenta-2,4-dienoate

2,6-dioxo-6-phenylhexa-3-enoate + H₂O → H⁺ + (2Z)-2-hydroxypenta-2,4-dienoate + benzoate

H₂O + (2Z,4E)-2-hydroxy-6-oxohexa-2,4-dienoate → formate + H⁺ + (2Z)-2-hydroxypenta-2,4-dienoate

H₂O + 2-hydroxy-7-methyl-6-oxo-2,4-octadienoate → isobutanoate + H⁺ + (2Z)-2-hydroxypenta-2,4-dienoate

H₂O + (2Z,2E)-2-hydroxy-6-oxo-6-(2-hydroxyphenyl)-hexa-2,4-dienoate → salicylate + H⁺ + (2Z)-2-hydroxypenta-2,4-dienoate

(2Z,2E)-2-hydroxy-6-oxo-6-(2,3-dihydroxyphenyl)-hexa-2,4-dienoate + H₂O → 2,3-dihydroxybenzoate + H⁺ + (2Z)-2-hydroxypenta-2,4-dienoate

Reversible reaction (3)

H₂O + (2Z,4E)-2-hydroxy-6-oxonona-2,4-diene-1,9-dioate ↔ H⁺ + succinate + (2Z)-2-hydroxypenta-2,4-dienoate

(2Z)-2-hydroxypenta-2,4-dienoate ↔ 2-oxopent-4-enoate

(2Z)-2-hydroxypenta-2,4-dienoate ↔ (3E)-2-oxopent-3-enoate