Additional file 5.

Random collisions at silent versus expressed loci. Data points represent collision frequencies determined at silent (Dlk1/Emb/Lnp; black circles) or expressed (Usp22/Mtx2; red circles) loci. Best fit of the statistical helix model (Equations 1 and 5) was performed for each dataset (black curve = silent loci; red curve = expressed loci). The values of best fit parameters for each data set are indicated in the graph. Both the diameter (D) and the step (P) of the helix are larger in the expressed loci compared to the silent ones.

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Court et al. Genome Biology 2011 12:R42   doi:10.1186/gb-2011-12-5-r42