| Strain | Pseudomonas putida F1 |
| GI | 148549498 |
| Locus Tag | Pput_4292 |
| Description | sigma E regulatory protein MucB/RseB |
| Strain | Pseudomonas sp. UW4 |
| GI | 426408192 |
| Locus Tag | PputUW4_01280 |
| Description | sigma factor algU regulatory protein MucB |
| Strain | Pseudomonas aeruginosa PA7 |
| GI | 152986511 |
| Locus Tag | PSPA7_4755 |
| Description | negative regulator for alginate biosynthesis MucB |