2.1.1.269 6 8.8 maximum activity is observed at pH 7.0 to 8.0, about 50% activity at pH 6.0 and 8.8 698600 2.1.1.269 6 8.8 more than 50% of maximum activity within 698600 2.1.1.269 6.5 8.3 maximum activity is observed at pH 7.0 to 8.0, about 50% activity at pH 6.5 and 8.3 698600 2.1.1.269 6.5 8.3 more than 50% of maximum activity within 698600