6.3.3.2 enzyme loses activity when subjected to dialysis or concentration by ultrafiltration 1320 6.3.3.2 non-ionic detergent, 0.1% v/v Tween 20, and 10% v/v glycerol stabilize the enzyme which is extremely labile at 4 C 1319 6.3.3.2 stabilized by non-ionic detergent Tween 20 1328 6.3.3.2 the enzyme is stabilized by Tween 20 663298