| Strain | Pseudomonas syringae pv. phaseolicola 1448A |
| GI | 71736951 |
| Locus Tag | PSPPH_4707 |
| Description | pyrroloquinoline quinone biosynthesis protein PqqD |
| Strain | Pseudomonas putida DOT-T1E |
| GI | 397694935 |
| Locus Tag | T1E_2176 |
| Description | Coenzyme PQQ synthesis protein D 1 |
| Strain | Azotobacter vinelandii CA6 |
| GI | 482898626 |
| Locus Tag | AvCA6_41650 |
| Description | pyrroloquinoline quinone biosynthesis protein PqqD |