Figure 4.
Density of indel-purified segments in macroRNA promoters. Shown are the IPS densities within 400-bp regions upstream of macroRNA transcripts (red line) for 10 G+C content bins (horizontal axis), and the expected density based on the intergenic distribution of IPSs (black line; the gray band indicates 95% confidence intervals). IPS densities are substantially and significantly higher within putative core promoter regions.
