Additional file 2.

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Particle evolution for r = 2 and no interactions (Є = 10000).Evolution under non-homogeneous diffusion of 1,000 particles (depicted in green) for 1000 time step. A square slow patch on the upper left corner has a diffusion ratio of 2 and particles interaction is set to an intermediate level Є = 10000. For this important level of interactions, clusters appear everywhere but they are always more pronounced in the slow patch.

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Soula et al. BMC Biophysics 2012 5:6   doi:10.1186/2046-1682-5-6