| Strain | Pseudomonas stutzeri RCH2 |
| GI | 431929199 |
| Locus Tag | Psest_4133 |
| Description | RNA polymerase, sigma subunit, ECF family |
| Strain | Pseudomonas sp. UW4 |
| GI | 426411113 |
| Locus Tag | PputUW4_04215 |
| Description | ECF subfamily RNA polymerase sigma factor |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83648243 |
| Locus Tag | HCH_05594 |
| Description | TPR repeat-containing RNA polymerase sigma factor |