Table 2.
Temperature dependence of the fractional populations of PII, αR, and β conformations compared with predicted values
| Temp, °C | Alanine | Leucine | ||||
| f(PII) | f(αR) | f(β) | f(PII) | f(αR) | f(β) | |
| 30 | 0.60 (0.60) | 0.11 (0.11) | 0.29 (0.29) | 0.55 (0.55) | 0.10 (0.10) | 0.35 (0.35) |
| 40 | 0.60 (0.59) | 0.10 (0.12) | 0.30 (0.29) | 0.55 (0.54) | 0.09 (0.10) | 0.36 (0.35) |
| 50 | 0.58 (0.59) | 0.10 (0.12) | 0.32 (0.30) | 0.53 (0.54) | 0.10 (0.11) | 0.37 (0.35) |
| 60 | 0.58 (0.58) | 0.09 (0.12) | 0.33 (0.30) | 0.52 (0.53) | 0.11 (0.11) | 0.37 (0.35) |
| 70 | 0.55 (0.57) | 0.11 (0.13) | 0.34 (0.30) | 0.49 (0.53) | 0.12 (0.12) | 0.39 (0.35) |
| 80 | 0.54 (0.57) | 0.12 (0.13) | 0.34 (0.30) | 0.50 (0.52) | 0.11 (0.12) | 0.39 (0.36) |
Measured values are taken from the ATR-absorbance spectra. Predicted values (values in brackets) are found from the Boltzmann-weighted model (Eq. 2) using the data at 30 °C to find the relative Ei values.