1.4.1.14	-80°C, 50% glycerol, 100 mM potassium phosphate, 3 mM DTT, stable for up to 1 month	
1.4.1.14	25°C, 4°C or -20°C, relatively unstable	
1.4.1.14	4°C, a few days under air, stable	
1.4.1.14	phosphate buffer, per week, 20% loss of activity	
1.4.1.14	Tris buffer, overnight dialysis, total loss of activity