4.3.2.9	5.4	7.5	pH 5.4: about 85% of maximal activity, pH 7.5: about 50% of maximal activity, cyclization of Glu	
4.3.2.9	6	9.5	approx. half-maximal activity at pH 6 and 9.5	
4.3.2.9	6.5	11.5	approx. half-maximal activity at pH 6.5 and 11.5	
4.3.2.9	6.5	8.1	approx. half-maximal activity at pH 6.5 and 8.1	
4.3.2.9	7	8	pH 7.0: about 60% of maximal activity, pH 8.0: optimum, cyclization of Gln