2.7.1.66 100 - 30 min, about 30% loss of activity 641758, 641766 2.7.1.66 100 - pH 8.2, aqueous suspension in Tris-HCl, presence of substrate, t1/2: 10 min 641756 2.7.1.66 100 - solution in 1-butanol, activation of nearly 50% after 20 min 641756