| Strain | Pseudomonas protegens CHA0 |
| GI | 501683285 |
| Locus Tag | PFLCHA0_c58790 |
| Description | putrescine-binding periplasmic protein PotF |
| Strain | Pseudomonas poae RE*1-1-14 |
| GI | 447918914 |
| Locus Tag | H045_19620 |
| Description | putrescine ABC transporter substrate-binding periplasmic protein |
| Strain | Pseudomonas entomophila L48 |
| GI | 104784200 |
| Locus Tag | PSEEN5294 |
| Description | putrescine ABC transporter periplasmic putrescine-binding protein |