1.5.98.1 10 - enzyme diluted in 120 mM potassium phosphate buffer pH 6.0 at temperature below 10°C shows a half-life of less than 1 h. Higher concentrations of potassium phosphate stabilize, the optimum concentration being 0.5-0.8 M 727375 1.5.98.1 25 - stable for more than 70 h, native and recombinant enzyme 13757 1.5.98.1 40 - stable for more than 70 h, native and recombinant enzyme 13757 1.5.98.1 65 - 45% loss of activity in 1.5 h, 93% loss of activity in 24 h, recombinant enzyme. 35% loss of activity after 2 h, 96% loss of activity after 27 h 13757 1.5.98.1 90 - 30 min, stable up to over 90°C 486097 1.5.98.1 90 - stable for 60 min in 50 mM potassium phosphate buffer, pH 6.8. Less than 50% loss of activity after 1 h in deionized water 13755 1.5.98.1 90 - thermostable up to 90°C, only in the presence of salts. Complete stability in presence of 0.4-0.5 M K2HPO4 486086