Figure 5.

(A) FTIR temperature difference spectrum (65°C−25°C) of ¹³C-labeled Trp-Cage 10b. (B) Conformational relaxation kinetics of ¹³C-labeled Trp-Cage 10b, probed at the frequencies indicated, in response to a temperature jump from 5°C to 10°C. Smooth lines are fits of these data to either single exponential (1580 cm⁻¹ and 1612 cm⁻¹) or double exponential (1664 cm⁻¹) functions. The traces are offset for clarity. This figure is adapted from (62) with permission. To see this figure in color, go online.