| Strain | Pseudomonas aeruginosa UCBPP-PA14 |
| GI | 116051840 |
| Locus Tag | PA14_14710 |
| Description | Rrf2 family protein |
| Strain | Pseudomonas putida NBRC 14164 |
| GI | 512687491 |
| Locus Tag | PP4_44340 |
| Description | Rrf2 family transcriptional regulator IscR |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83647156 |
| Locus Tag | HCH_04462 |
| Description | iron-sulfur cluster assembly transcription factor IscR |