Which of the following is not a proteolytic enzyme?

Ptyalin (salivary amylase) breaks down carbohydrates.

Enzymes known as proteolytic enzymes are capable of breaking down proteins into smaller polypeptides and amino acids. The human digestive system breaks down the proteins in food using the digestive enzymes pepsin, trypsin, carboxypeptidase, and chymotrypsin. In neonates, casein (a milk protein) digestion is significantly aided by renin.