All of the following are trypsin inhibitors, except:
Enterokinase is a glycoprotein enzyme that activates trypsin and is present in the brush border of intestine. Ref: Biochemistry By Mary K. Campbell, Shawn O. Farrell, 7th Edition, Page 176; Harper's Textbook of Biochemistry, 27th Edition, Page 597
Alpha - 1 antitrypsin
Alpha - 1 - antiproteinase
Enterokinase
Egg - white