| Strain | Pseudomonas putida S16 |
| GI | 339489138 |
| Locus Tag | PPS_4249 |
| Description | two component sigma-54 specific Fis family transcriptional regulator |
| Strain | Pseudomonas aeruginosa M18 |
| GI | 386061689 |
| Locus Tag | PAM18_5632 |
| Description | putative two-component response regulator |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83643805 |
| Locus Tag | HCH_00925 |
| Description | sigma 54-dependent transcriptional activator |