1.1.1.71	-20°C, 10 mM TEA-HCl buffer pH 7.5, at least 80 days, no loss of activity	
1.1.1.71	-20°C, 30 days, 80% residual activity	
1.1.1.71	-20°C, 30 days, enzyme retains 80% of its original activity	
1.1.1.71	-20°C, crude enzyme retains half of its original activity following incubation at -20°C for 75 days and almost one third of its original activity following incubation for 42 days	
1.1.1.71	-20°C, retains approximately 80% of its original activity after 10 days	
1.1.1.71	4°C, inactive within 10 days	
1.1.1.71	8°C, 50 mM TEA-HCl buffer pH 7.5, 1 day, 91% loss of activity