1.14.14.3 -20°C 1.14.14.3 -20°C, 50 mM potassium phosphate buffer, pH 7.0, protein concentration 1 mg/ml , -20°C, 0.1 M phosphate buffer, pH 7, 0.1 mM dithiothreitol, 1 mM EDTA 1.14.14.3 -20°C, phosphate buffer 1.14.14.3 -80°C, 0.5 mM dithiothreitol 1.14.14.3 0-4°C, immobilized enzyme, 0.1 mM dithiothreitol, 20% loss of activity in 3 days