| Strain | Pseudomonas aeruginosa M18 |
| GI | 386059612 |
| Locus Tag | PAM18_3551 |
| Description | putative sigma-70 factor, ECF subfamily |
| Strain | Pseudomonas putida HB3267 |
| GI | 431803805 |
| Locus Tag | B479_19365 |
| Description | RNA polymerase ECF-subfamily sigma factor |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83648243 |
| Locus Tag | HCH_05594 |
| Description | TPR repeat-containing RNA polymerase sigma factor |