Loop-closure () and loop-opening () time constants for the labelled peptides

, is the number of glycine-serine units. , is the number of peptide bonds ( is equal to ). , and , are the time constants derived from a single-exponential fit (Eqs. 2 and 3) of the autocorrelation function G() (Eq. 1), over the 6–300 ns time range, for the simulated and experimental labelled peptides, respectively. Errors reported in the experimental values are one standard deviation obtained from three independent measurements.