| MMDBr0013325 | (2Z,4E)-2-hydroxy-6-oxohexa-2,4-dienoic acid | 2-oxopent-4-enoic acid | 2-hydroxymuconate semialdehyde hydrolase | Hydrolysis of bond | RHEA | 34755880 |
| MMDBr0013644 | Pyrocatechol | (2Z,4E)-2-hydroxy-6-oxohexa-2,4-dienoic acid | Catechol-2,3-dioxygenase | Oxygenative ring cleavage | RHEA | 34755880 |
| MMDBr0014227 | (S)-4-hydroxy-2-oxopentanoic acid | Acetaldehyde | 4-hydroxy-2-oxovalerate aldolase | Aldol addition (or reverse) | RHEA | 34755880 |
| MMDBr0014313 | Acetaldehyde | Acetyl-CoA | Acetaldehyde dehydrogenase | Dehydrogenation | RHEA | 34755880 |
| MMDBr0014433 | (3E)-2-oxohex-3-enedioate | 2-oxopent-4-enoic acid | 4-oxalocrotonate decarboxylase | Decarboxylation | RHEA | 34755880 |
| MMDBr0015220 | (2Z,4E)-2-hydroxyhexa-2,4-dienedioic acid | (3E)-2-oxohex-3-enedioate | 2-hydroxymuconate tautomerase | Ketonization | RHEA | 34755880 |
| MMDBr0015322 | (2Z,4E)-2-hydroxy-6-oxohexa-2,4-dienoic acid | (2Z,4E)-2-hydroxyhexa-2,4-dienedioic acid | 2-hydroxymuconic semialdehyde dehydrogenase | Dehydrogenation | RHEA | 34755880 |
| MMDBr0016921 | Hydrogen Ion | Pyrocatechol | Phenol 2-monooxygenase, oxygenase component MhpL | Oxygenation; Reduction | RHEA | 34755880 |
| MMDBr0016922 | Hydrogen Ion | Pyrocatechol | Phenol 2-monooxygenase, oxygenase component MhpL | Oxygenation; Reduction | RHEA | 34755880 |
