Figure 6.

(a) Frequency (f) distribution of lengths of contiguous patches having H3K9me3 modifications, for three different chromosomes, scaled with maximal frequency (f₀). See Fig. S6 for a similar plot for all chromosomes. Most of the patches are smaller in length; very long patches are rare. (b) A snapshot of the chromatin structure with NHPs and heterogeneous interactions is shown; the system was simulated with electrostatic interactions in the first eight nucleosomes and with no electrostatic interaction in the remaining 12 nucleosomes. Note that the radius of gyration or “width” of the dense cluster indicate a length scale less than 30 nm. To see this figure in color, go online.