Metalloprotease which cleaves a single amino acid from the C-terminal end of polypeptide chains. Shows a strong preference for peptides with a terminal lysine residue. Preferential release of a C-terminal lysine or arginine amino acid. Highly resistant to inhibition by potato carboxypeptidase inhibitor (PCI). Moderately inhibited by leech carboxypeptidase inhibitor (LCI) and tick carboxypeptidase inhibitor (TCI). kcat is 45.7 sec(-1) for benzoyl-glycyl-lysine (Bz-Gly-Lys). kcat is 15.3 sec(-1) for N-(4-furylacryloyl)-Ala-Lys (FAAK). Belongs to the peptidase M14 family.