2.1.1.42	-20°C, 1-3 mg protein/ml in 0.02 M Tris-HCl buffer loses about 30% of its activity after 1 month	
2.1.1.42	-20°C, stored in 10% glycerol for 2 months, no singnificant loss in enzyme activity	
2.1.1.42	4°C, acetone powder of fresh cells as source of the enzyme can be kept without significant loss of enzyme activity	
2.1.1.42	4°C, highly unstable, stored with Triton X-100, bovine serum albumin, ethylene glycol, dimethyl sulfoxide, 2-mercaptoethanol, dithiothreitol or ethylene glycol monoethylether, loses over 90% of its activity within 94 h	
2.1.1.42	4°C, stable when stored in buffer containing 10% (v/v) glycerol for 3-4 weeks	
2.1.1.42	4°C, stable when stored in buffer containing 10% (v/v) glycerol for 3–4 weeks