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Simulation of FCS experiment. Histograms of lengths of fluorescence bursts. Identical to the plots in Fig. 5, the plots in panels a and c are fitted by an exponential decay, whereas the plot in b is fitted by a double-exponential decay, with one decay rate retained fixed with the value obtained in panel a. The decay rates obtained are (a) 
, (b) 
and 
, and (c) 
. Sketches of the simulated structure for each situation are shown as insets.
