| Strain | Pseudomonas fluorescens Pf0-1 |
| GI | 77456673 |
| Locus Tag | Pfl01_0445 |
| Description | potassium efflux protein KefA |
| Strain | Pseudomonas putida BIRD-1 |
| GI | 386014337 |
| Locus Tag | PPUBIRD1_4856 |
| Description | Potassium efflux system kefA |
| Strain | Pseudomonas aeruginosa UCBPP-PA14 |
| GI | 116053170 |
| Locus Tag | PA14_66400 |
| Description | potassium efflux protein KefA |