The activation of chymotrypsinogen, a zymogen, requires the cleavage of a bond between arg-15 and ile-16, and the subsequent attraction of ile-16 and asp-194. complete parts (a) and (b). a) complete the following reaction for the proteolytic cleavage of arg-15 and ile-16 at ph 7.6. specify the enzyme that catalyzes the reaction and modify the given structure to form the products. add or remove bonds, atoms, and charges, and move atoms as necessary.