of the same category are secreted by its source gland?

Solution:

Pancreatic juice contains an enzyme called trypsin, which converts chymotrypsinogen to chymotrypsin by activating an inactive enzyme called chymotrypsinogen.

This activates chymotrypsin is critical in further disintegrating the partially-hydrolyzed proteins.

Trypsinogen and carboxypeptidase are two more digestive enzymes released by the pancreas that belong to the same family.