| AmpII | Aminopeptidase type II |
| Mpl | Metalloprotease |
| AmpS | Aminopeptidase S |
| PepP | X-prolyl aminopeptidase |
| BHI | Brain heart infusion |
| LB | Luria–Bertani broth |
| SP | Secreted proteins |
| TCA | Trichloroacetic acid |
| WCL | Whole cell lysates |
| MP | Membrane proteins |
| WP | Cell wall proteins |
| IPTG | Isopropyl β-D-1-thiogalactopyranoside |
| AAs-pNA | Amino acids-p-nitroaniline |
| DMEM | Dulbecco’s modified eagle medium |
| FBS | Fetal bovine serum |
| AmpT | Aminopeptidase T |
| LAP | Leucine aminopeptidase |