2.1.1.56	-20°C, in 10% v/v glycerol, at least several months	
2.1.1.56	-20°C, Tris buffer, pH 7.5, 50% glycerol	
2.1.1.56	-80 °C, Tris-HCl buffer, pH 7.5, 10% glycerol	
2.1.1.56	-80°C, several months	
2.1.1.56	0°C, 16 h at pH 7.5	
2.1.1.56	4°C or -20°C, several months, stable	
2.1.1.56	4°C, t1/2: less than 36 h