2.7.7.6 7 8.7 pH 7.0: about 75% of maximal activity, pH 8.7: about 75% of maximal activity 643571 2.7.7.6 7 9 pH 7.0: about 30% of maximal activity, pH 9.0: about 60% of maximal activity 643565 2.7.7.6 7.5 9 80% of maximall activity within this range 721368