3.4.19.3 -20°C or 4°C, 24 h, more than 50% loss of activity of the enzyme solubilized by sodium deoxycholate and Triton X-100 3.4.19.3 -20°C, 50 mM phosphate buffer, pH 7, 10 mM 2-mercaptoethanol, 70% loss of activity after 1 month 3.4.19.3 -20°C, pH 7, in presence of 5 mM EDTA and 5 mM 2-mercaptoethanol, stable for 3 months 3.4.19.3 -20°C, rapid inactivation in presence of EDTA and 2-mercaptoethanol 3.4.19.3 -20°C, retains more than 90% of its activity for 1 month in the presence of a thiol-reducing agent 3.4.19.3 -80°C, 17% loss of activity after 4 weeks 3.4.19.3 4°C, -20°C or -70°C, 1 month, 90% loss of activity 3.4.19.3 4°C, 50 mM phosphate buffer, pH 7, 10 mM 2-mercaptoethanol, 13% loss of activity after 1 month 3.4.19.3 4°C, 72 h, 10% loss of activity of the enzyme solubilized in CHAPS 3.4.19.3 4°C, 72 h, 60% loss of activity of the enzyme solubilized in CHAPS