2.6.1.64	-20°C, 30 mM phosphate buffer, pH 7.0, 1 mM mercaptoethanol, 1 mM EDTA, stable for at least 1 month	
2.6.1.64	4°C, both isozymes stored in 200 mM potassium phosphate buffer, pH 7.2, 20% glycerol and 5 mM 2-mercaptoethanol, stable for at least 2 months