3.1.2.5 4 - microsomal, 6 h stable 81014 3.1.2.5 20 - without substrate, microsomal, 31% loss of activity after 15 min 81014 3.1.2.5 37 - without substrate, cytoplasm, 25% loss of activity after 30 min, microsomal, 50% loss of activity after 5 min 81014