1.14.15.3 65 - purified recombinant enzyme, 15 min, inactivation 1.14.15.3 71.2 - melting temperature, mutant K18A 1.14.15.3 74.5 - melting temperature, wild-type 1.14.15.3 75.3 - melting temperature, mutant K359A 1.14.15.3 78.7 - melting temperature, mutant K193A