| Strain | Pseudomonas fulva 12-X |
| GI | 333901512 |
| Locus Tag | Psefu_3329 |
| Description | cation antiporter |
| Strain | Pseudomonas putida S16 |
| GI | 339486757 |
| Locus Tag | PPS_1836 |
| Description | putative monovalent cation/H+ antiporter subunit E |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83643686 |
| Locus Tag | HCH_00801 |
| Description | putative monovalent cation/H+ antiporter subunit E |