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Relaxation behavior of the average radius of gyration, Rg (Upper) and average fraction helicity (Lower) of each individual helix, obtained at T ≈ 300 K. Helicity is determined with the criterion of Kabsch and Sander (51). The Rg relaxation data are fitted (red curves, Upper) to a double-exponential function, f(t) = a1 exp(−t/τfast) + a2 exp(−t/τslow) + b, using a Levenberg–Marquardt fit procedure with a1, a2, τfast, τslow, and b as free parameters.
