| Strain | Pseudomonas entomophila L48 |
| GI | 104783726 |
| Locus Tag | PSEEN4783 |
| Description | protocatechuate 3,4-dioxygenase subunit alpha (3,4-PCD) |
| Strain | Pseudomonas putida DOT-T1E |
| GI | 397693598 |
| Locus Tag | T1E_0829 |
| Description | Protocatechuate 3,4-dioxygenase alpha chain |
| Strain | Pseudomonas fluorescens Pf0-1 |
| GI | 77457498 |
| Locus Tag | Pfl01_1271 |
| Description | protocatechuate 3,4-dioxygenase subunit alpha |