Physiology G.I.T 6376d453 Which enzyme is not release as proenzyme? A Pepsin B Amylase C Trypsin D Chymotrypsin High-Yield Explanation Ptyalin(alpha amylase) aids digestion of starch to produce dextrin and maltose. Ref.Textbook of physiology by AK Jain 7th edition page no.209