2.3.2.15	-20°C, 10 mM Tris-HCl, pH 8.0, 1 mM mercaptoethanol, 20% glycerol and 1% bovine serum albumin	
2.3.2.15	-20°C, 10 mM Tris-HCl, pH 8.0, 10 mM 2-mercaptoethanol, 0.1% NaN3	
2.3.2.15	-20°C, best storage temperature