Alpha-chymotrypsin

From Bovine PancreasE.C.3.4.21.13X Crystallized; lyophilizedEssentially salt-free powderActivity: 40-50 units/mg proteinUnit Definition: One unit will hydrolyze 1.0 mole of N-benzoyl-L-tyrosine ethyl ester (BTEE) per minute at pH 7.8 and 25°C.Ref.: Yappel, A., et al., J. Am. Chem. Soc., 88: 2573 (1966).