| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15596353 |
| Locus Tag | PA1156 |
| Description | NrdA, catalytic component of class Ia ribonucleotide reductase |
| Strain | Pseudomonas stutzeri DSM 10701 |
| GI | 397687575 |
| Locus Tag | PSJM300_12360 |
| Description | ribonucleotide-diphosphate reductase subunit alpha |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83649536 |
| Locus Tag | HCH_06929 |
| Description | ribonucleotide-diphosphate reductase subunit alpha |