3.1.1.25	4	-	no activity below	
3.1.1.25	5	10	pH 5.0: about 55% of maximal activity, pH 10.0: about 35% of maximal activity	
3.1.1.25	6	8.5	-	
3.1.1.25	6	9.6	pH 6.0: about 70% of maximal activity, pH 9.6: about 55% of maximal activity, hydrolysis of dihydrocoumarin	
3.1.1.25	7	9	pH 7.0: about 30% of maximal activity, pH 9.0: about 80% of maximal activity, substrate: methyl paraoxon