| Strain | Pseudomonas protegens CHA0 |
| GI | 501677887 |
| Locus Tag | PFLCHA0_c04100 |
| Description | histidine transporter, periplasmic histidine-binding protein ProX |
| Strain | Pseudomonas poae RE*1-1-14 |
| GI | 447919520 |
| Locus Tag | H045_22670 |
| Description | putative histidine transporter substrate-binding protein |
| Strain | Pseudomonas entomophila L48 |
| GI | 104781700 |
| Locus Tag | PSEEN2601 |
| Description | glycine betaine ABC transporter periplasmic binding protein |