to study the possible stabilization of the oxyanion of the tetrahedral intermediate formed in the course of the catalyses by cysteine proteinases , papain , chymopapain , papaya peptidase a , and ficin , we synthesized n- ( benzyloxycarbonyl ) phenylalanylthioglycine o-ethyl ester and compared its hydrolysis with that of the corresponding oxygen ester , a highly specific substrate of the above enzymes .
C2717970
cysteine proteinases
C0020291
hydrolysis