6.5.1.3 30 - stable for at least 2 h 1983 6.5.1.3 56 - 2 min, complete inactivation 1983 6.5.1.3 60 90 relatively stable at 60°C with a half-life of 10 h, activity increases after incubation, not stable at temperatures. Enzyme starts to lose activity rapidly, no activity at all after 1 h at 80°C, loses all of its activity after 5 min at 90°C 653392 6.5.1.3 65 - realatively stable at 662976 6.5.1.3 80 - loses all activity above 662976 6.5.1.3 60 65 optimal for stability 728392