| Strain | Pseudomonas syringae pv. syringae B728a |
| GI | 66045379 |
| Locus Tag | Psyr_2139 |
| Description | potassium efflux system protein |
| Strain | Pseudomonas aeruginosa B136-33 |
| GI | 478480021 |
| Locus Tag | G655_19160 |
| 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 |