| Strain | Pseudomonas syringae pv. tomato str. DC3000 |
| GI | 28870635 |
| Locus Tag | PSPTO_3474 |
| Description | putative monovalent cation/H+ antiporter subunit E |
| Strain | Pseudomonas putida DOT-T1E |
| GI | 397695697 |
| Locus Tag | T1E_2947 |
| Description | monovalent cation/H+ antiporter subunit |
| Strain | Azotobacter vinelandii CA6 |
| GI | 482900367 |
| Locus Tag | AvCA6_19560 |
| Description | sodium hydrogen antiporter subunitE, ShaE |