3.1.1.61	-20°C, 10 mM sodium acetate buffer, pH 4.35, 50% glycerol, 0.1 mM DTT, purified enzyme stable	
3.1.1.61	-70°C, stable for at least 1 month	
3.1.1.61	4°C, 10% glycerol, 0.04% sodium azide, stable for at least several months