| Strain | Pseudomonas putida GB-1 |
| GI | 167036287 |
| Locus Tag | PputGB1_5301 |
| Description | potassium efflux system protein |
| Strain | Pseudomonas aeruginosa DK2 |
| GI | 392985309 |
| Locus Tag | PADK2_19605 |
| Description | glutathione-regulated potassium-efflux system protein KefB |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83643660 |
| Locus Tag | HCH_00774 |
| Description | Kef-type K+ transport system membrane protein |