1.20.1.1 39 - wild-type, melting temperature 671425 1.20.1.1 40 - stable below 726694 1.20.1.1 40.5 - rapid inactivation, half life less than 10 min, 1 mM NAD+ partially protects against thermal inactivation, E175A/A176R double mutant is readily protected against inactivation by addition of 1 mM NADP+ for at least 15 min 657956 1.20.1.1 45 - half-life 80.5 h 728004 1.20.1.1 45 - hlf-life 35 min 726694 1.20.1.1 55 - complete inactivation 726694 1.20.1.1 59.3 - mutant Q137R/I150F/Q215L/R275Q/L276Q/A319E/V315A/Q132R/V71I/E130K/I313L/A325V, melting temperature 671425