| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15596404 |
| Locus Tag | PA1207 |
| Description | glutathione-regulated potassium-efflux system protein KefB |
| Strain | Pseudomonas putida S16 |
| GI | 339489977 |
| Locus Tag | PPS_5098 |
| Description | potassium efflux system protein |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83643660 |
| Locus Tag | HCH_00774 |
| Description | Kef-type K+ transport system membrane protein |