Fig. 1

Quality metrics of ChIP-exo datasets as reported by ChIPexoQual. a ARC vs. URC plots for IMR90, K562 and U2OS datasets. The color represents the number of read islands (enriched regions) or bins, and with increasing number of read islands, the color shifts from blue to yellow. b Region composite plots and Forward Strand Ratio plots for IMR90, K562 and U2OS datasets representing the strand compositions of read islands (enriched regions). Left panel: Region composite plots, in which green represents the proportion of read islands that have reads only on the reverse strand, blue represents the proportion with reads on forward strands and red represents read islands with reads on both strands. Right panel: FSR plots in which quantiles are marked with green (0.25), red (0.5) and purple (0.75). c β1 and β2, estimates of library complexity for IMR90, K562 and U2OS datasets. The box and whiskers plot here, gives the median value of β1 and β2 for all three cell types