| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15596548 |
| Locus Tag | PA1351 |
| Description | probable sigma-70 factor, ECF subfamily |
| Strain | Pseudomonas stutzeri DSM 10701 |
| GI | 397685341 |
| Locus Tag | PSJM300_01100 |
| 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 |