3.5.1.13 4 - purified recombinant enzyme, 30% activity remaining after 1 h 3.5.1.13 4.5 - purified recombinant enzyme, 60% activity remaining after 1 h 3.5.1.13 4.5 10 purified His6-tagged enzyme, over 50% activity remaining within this range after 1 h 3.5.1.13 4.5 10 purified recombinant enzyme, over 50% activity within this range at 35°C 3.5.1.13 5 7.5 stable 3.5.1.13 5 10 more than 70% activity after preincubation for 1 h 3.5.1.13 5 10 purified recombinant enzyme, over 70% activity remaining after 1 h