MeSH note : a zinc-endopeptidase from the crayfish Astacus astacus & Hydra vulgaris; releases
nitroaniline from succinyl-alanyl-alanyl-alanyl-4-nitroanilide (Suc-Ala-Ala-Ala-pNA);
acts on peptides containing 5 or more amino acids, preferably with ALA in P1' and
Pro in P2';