FIGURE 5.

(Left) The fluorescence correlation experiment can be simulated in the Monte Carlo simulation by labeling some of the lipid chains with a marker (white dots) and by introduction of a focus with Gaussian cross section (concentric circles). (Upper right panel) Assuming instantaneous emission after excitation with a Gaussian detection probability, a fluorescence signal from the diffusing labeled lipids can be obtained. (Lower right panel) Autocorrelated profile of the signal in the upper panel.