3.2.1.85 40 60 P-beta-gal II, stable below 40°C, inactivated at 60°C 208855 3.2.1.85 50 - rapid thermal inactivation, about 50% of activity after 3 min with extracts of strain CT-1, after 5 min with RE1755A 208845 3.2.1.85 55 - 50% of activity after 5 min in Tris-buffer 208847 3.2.1.85 70 - stable up to for 5 min 208848