| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15599094 |
| Locus Tag | PA3899 |
| Description | probable sigma-70 factor, ECF subfamily |
| Strain | Pseudomonas resinovorans NBRC 106553 |
| GI | 512620359 |
| Locus Tag | PCA10_47060 |
| Description | putative RNA polymerase ECF-type sigma factor |
| Strain | Pseudomonas syringae pv. tomato str. DC3000 |
| GI | 28868422 |
| Locus Tag | PSPTO_1209 |
| Description | RNA polymerase sigma-70 family protein |