2.4.1.90	-20°C, 0.02 M Tris/HCl buffer, pH 7.5, stable for several months	
2.4.1.90	-20°C, 1 mg/ml bovine serum albumin	
2.4.1.90	-20°C, 10% glycerol, up to 14 months, no loss of activity	
2.4.1.90	-20°C, bovine serum albumin, stable for up to 60 d	
2.4.1.90	-20°C, partially purified enzyme stable for several weeks, purified enzyme stable for 1 week	
2.4.1.90	-20°C, stable fo at least 1 month	
2.4.1.90	-20°C, stable for 3 weeks	
2.4.1.90	-20°C, stable for at least 2 months	
2.4.1.90	4°C, 0.1% bovine serum albumin, stable for 3 months	
2.4.1.90	4°C, concentrated enzyme