1.3.98.1	6	10.5	assay in this range	390916	
1.3.98.1	6	11	best in sodium phosphate and sodium diphosphate buffer, not active below pH 6.0, 60% of activity maximum at pH 11.0	390910	
1.3.98.1	7	8.5	-	655517	
1.3.98.1	7.5	9	-	390916