Endopeptidase, Exopeptidase (Angiotensin-converting enzyme)
Serine proteases
Cysteine protease: Papain, Cathepsin (B, C, K), Caspase, Calpain
Metalloproteinases
Aspartic acid protease: Pepsin - Chymosin - Renin - Plasmepsin - Signal peptide peptidase