Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2011-05-31
Physics
Condensed Matter
Soft Condensed Matter
50 pages, 8 figures, 1 appendix
Scientific paper
We have developed a new model to describe FRET efficiency (E FRET) between freely-diffusing membrane probes in phase-separated bilayers (Finite Phase-separation FRET, or FP-FRET), that in principle applies to any system where phase domain dimensions are larger than ~Ro . Here we use Monte Carlo techniques to simulate E FRET for a range of probe partitioning behaviors and domain sizes, and then fit the simulated data to the FP-FRET model to recover simulation parameters. We find that FP-FRET can determine domain size to within 5% of simulated values for domain diameters up to ~ 5Ro, and to within 15% for diameters up to ~ 20Ro . We also investigated the performance of the model in cases where specific model assumptions are not valid.
Feigenson Gerald W.
Heberle Frederick A.
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