| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15600273 |
| Locus Tag | PA5080 |
| Description | prolyl aminopeptidase |
| Strain | Pseudomonas stutzeri DSM 4166 |
| GI | 386019020 |
| Locus Tag | PSTAA_0382 |
| Description | proline iminopeptidase |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83643910 |
| Locus Tag | HCH_01038 |
| Description | proline iminopeptidase |