3.2.1.167 3 7 - 666782 3.2.1.167 3 7 pH 3.0: about 50% of maximal activity, pH 7.0: about 65% of maximal activity 706477 3.2.1.167 3.5 7 activity range, profile overview 731207 3.2.1.167 4.5 - activity completely disappeares below pH 4.5 657119