3.4.11.22	4°C, 50 mM Tris-HCl buffer, pH 7.2, 38% loss of activity after 4 days, 81% loss of activity after 11 days	
3.4.11.22	4°C, aqueous enzyme solution, in presence of Brij 35, pH 6.0-9.0, stable for a few days	
3.4.11.22	frozen, 50 mM ammonium acetate buffer, pH 6.2