3.4.22.32 broad specificity for cleavage of proteins, but strong preference for Z-Arg-Arg-/-NHMec amongst small molecule substrates - - 3.4.22.32 broad specificity for cleavage of proteins, but strong preference for Z-Arg-Arg-/-NHMec amongst small molecule substrates endopeptidase - 3.4.22.32 broad specificity for cleavage of proteins, but strong preference for Z-Arg-Arg-/-NHMec amongst small molecule substrates The most abundant of the cysteine endopeptidases of the stem of the pineapple plant, Ananas comosus. Distinct from the bromelain found in the pineapple fruit (3.4.22.33). Scarcely inhibited by chicken cystatin and also very slowly inactivated by 3.4.22.4. -