1.5.1.8	-20°C, 1 month, 50% loss of activity	
1.5.1.8	-20°C, 2 months, no loss of activity	
1.5.1.8	-25°C, 1 month, stable	
1.5.1.8	-70°C, 6 months, stable	
1.5.1.8	0°C, 10 mM Tris-HCl buffer, pH 7.6, 5 mM 2-mercaptoethanol, 0.1 mM EDTA, stable	
1.5.1.8	4°C, pH 7.5, 5 mM 2-mercaptoethanol, 0.1 mM EDTA, storage conditions which are most effective in preserving enzyme activity