| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15595961 |
| Locus Tag | PA0764 |
| Description | negative regulator for alginate biosynthesis MucB |
| Strain | Pseudomonas putida HB3267 |
| GI | 431804161 |
| Locus Tag | B479_21155 |
| Description | sigma E regulatory protein MucB/RseB |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83644626 |
| Locus Tag | HCH_01792 |
| Description | sigma factor algU negative regulatory protein MucB |