4.2.3.10	4°C, immobilized enzyme on CH-activated Sepharose, 1 month, retains over 30% of the original activity, the activity of the free enzyme is negligible	
4.2.3.10	4°C, immobilized enzyme on CH-activated Sepharose, in presence of 1 mM sodium diphosphate as substrate analog, 1 month, retains over 60% of the original activity