1.4.3.10 6.8 9 pH 6.8: about 50% of maximal activity, pH 9.0: about 60% of maximal activity 395444 1.4.3.10 7 10 the enzyme exhibits more than 90% of the maximum activity at pH 7.0 to 10.0 725184 1.4.3.10 7.5 9.5 pH 7.5: about 60% of maximal activity, pH 9.5: about 80% of maximal activity 765138