| Strain | Pseudomonas syringae pv. syringae B728a |
| GI | 66043768 |
| Locus Tag | Psyr_0501 |
| Description | potassium efflux protein KefA |
| Strain | Pseudomonas putida BIRD-1 |
| GI | 386014337 |
| Locus Tag | PPUBIRD1_4856 |
| Description | Potassium efflux system kefA |
| Strain | Azotobacter vinelandii CA6 |
| GI | 482902131 |
| Locus Tag | AvCA6_45100 |
| Description | potassium efflux protein KefA |