Enrichment level of bins with respect to gene density in a 1 Mbp region.

<p>The axis indicates lowest to highest gene density. (a) The axis indicates the total number of H3K27me3 ChIP-seq fragments divided by the number of Mbp regions (counts per megabase) found in each gene density. (b) The plots are re-normalized so that the axis range is same for both ES and NP cell data. We see that the enrichment level of ChIP-seq data increases with respect to gene density for both ES and NP cells.