2.8.2.24	-20°C, 0.25 M sucrose and bovine serum albumin, 6 months	
2.8.2.24	-20°C, 20 mM Tris buffer, pH 7.5, 14 mM 2-mercaptoethanol, 10% glycerol, at least 2 months	
2.8.2.24	4°C, 14 mM 2-mercaptoethanol, t1/2: about 2 weeks	
2.8.2.24	4°C, more than 50% loss of activity within 48 h