| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15600273 |
| Locus Tag | PA5080 |
| Description | prolyl aminopeptidase |
| Strain | Pseudomonas putida H8234 |
| GI | 512579861 |
| Locus Tag | L483_30295 |
| Description | proline iminopeptidase |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83643910 |
| Locus Tag | HCH_01038 |
| Description | proline iminopeptidase |