| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15600273 |
| Locus Tag | PA5080 |
| Description | prolyl aminopeptidase |
| Strain | Pseudomonas stutzeri DSM 10701 |
| GI | 397688670 |
| Locus Tag | PSJM300_17890 |
| Description | proline iminopeptidase |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83643910 |
| Locus Tag | HCH_01038 |
| Description | proline iminopeptidase |