| Strain | Pseudomonas putida KT2440 |
| GI | 26987744 |
| Locus Tag | PP_1008 |
| Description | ECF subfamily RNA polymerase sigma factor |
| Strain | Pseudomonas denitrificans ATCC 13867 |
| GI | 472325417 |
| Locus Tag | H681_11265 |
| Description | ECF subfamily RNA polymerase sigma-24 factor |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83647569 |
| Locus Tag | HCH_04888 |
| Description | DNA-directed RNA polymerase specialized sigma subunit sigma24-like protein |