| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15596548 |
| Locus Tag | PA1351 |
| Description | probable sigma-70 factor, ECF subfamily |
| Strain | Pseudomonas stutzeri ATCC 17588 = LMG 11199 |
| GI | 339492290 |
| Locus Tag | PSTAB_0213 |
| Description | ECF subfamily RNA polymerase sigma-70 factor |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83648243 |
| Locus Tag | HCH_05594 |
| Description | TPR repeat-containing RNA polymerase sigma factor |