2.7.4.8	-10°C, more than a month	
2.7.4.8	-15°C, more than 6 months	
2.7.4.8	-20°C, stable at all stages of purification	
2.7.4.8	-20°C, stable for several months after purification by Blue Sepharose and gel filtration	
2.7.4.8	-25°C, stable	
2.7.4.8	-30°C, in N-ethylmorpholine-HCl buffer, pH 7.5, several years	
2.7.4.8	0-4°C, 6-10 weeks	
2.7.4.8	0°C, below, in 70% saturated ammonium sulfate, several years	
2.7.4.8	4°C, at pH-values below 4 or above 9, inactivation within 48 h	
2.7.4.8	4°C, calf thymus enzyme, stable in the absence of thiols	
2.7.4.8	4°C, diluted calf thymus enzyme solution, 0.002 mg/ml, inactivation within 10 days, KCl protects	
2.7.4.8	4°C, in 20% glycerol, at least 1 month	
2.7.4.8	4°C, in N-ethylmorpholine-HCl buffer, pH 7.5, several years	
2.7.4.8	4°C, partially purified calf thymus enzyme preparation in the presence of 1 M KCl, 3 months	
2.7.4.8	glycerol, 20%, stabilizes labile enzyme during storage