Table 3.
Protein | Tm (°C)a | ΔH°VH (kcal/mole)a | ΔCp (cal/K•mole)a |
WT | 58.9 ± 0.4 | 51.3 ± 0.8 | 1121 ± 360 |
V35I/D50N | 58.9 ± 0.3 | 50.0 ± 1.0 | 1057 ± 450 |
G40E | 41.8 ± 0.7 | 38.4 ± 1.9 | 867 ± 442 |
G40E,D50N | 40.8 ± 0.5 | 34.9 ± 2.1 | 879 ± 360 |
D50G | 53.9 ± 0.1 | 49.4 ± 0.8 | 1360 ± 60 |
E54K | 61.2 ± 0.3 | 46.3 ± 3.2 | 1033 ± 90 |
G59S | 52.8 ± 0.2 | 48.4 ± 0.4 | 1403 ± 90 |
Thermal unfolding studies were performed as described in Materials and Methods. Data were fit to a two-state model of unfolding described by equation 5.
a Average values and standard deviations from three trials are reported. The √var for fits of each individual trial ranged from 0.003–0.008 with an average of 0.004.