2.4.1.210	3.5	9.5	4°C, 12 h, stable	658786	
2.4.1.210	6.5	-	activity below pH 6.5 is inhibited by a closed D-ring	288690	
2.4.1.210	10.5	-	4°C, 12 h, 62% loss of activity	658786