ID 3.4.24.21 DE astacin. AN Astacus proteinase. AN crayfish small-molecule proteinase. CA Hydrolysis of peptide bonds in substrates containing five or more amino CA acids, preferentially with Ala in P1', and Pro in P2'. CC -!- A digestive endopeptidase from the cardia of the crayfish Astacus CC fluviatilis. CC -!- Belongs to peptidase family M12A. CC -!- Formerly EC 3.4.99.6. DR P07584, ASTA_ASTAS ; Q21179, NAS18_CAEEL; Q18439, NAS8_CAEEL ; DR D2KBH9, NAS8_STECR ; //