Exhibits carboxy-monopeptidase as well as carboxy-dipeptidase activity (PubMed:12553736, PubMed:10615013). Capable of producing kinin potentiating peptides (PubMed:10615013). Release of C-terminal amino acid residues with broad specificity, but lacks action on C-terminal proline. Shows weak endopeptidase activity. The disulfide bridge formed between Cys-35 in the propeptide and the active site residue Cys-94 may prevent activation of the zymogen through formation of a reversible covalent bond with the active site residue. Ubiquitous. Belongs to the peptidase C1 family.