2.7.7.24 6 10 - 643081 2.7.7.24 6 10 pH 6.0: about 50% of maximal activity, pH 10.0: about 60% of maximal activity 662454, 748158 2.7.7.24 7 8 more than 80% activity between pH 7.0 and 8.0 760870