Poised RTSSs enriched for active chromatin also have enrichment of Pol II. A selection of 6184 characteristic poised RTSSs enriched for active chromatin marks also have additional enrichment of Pol II in K562. Plots for the other cell lines are in [Additional file 1: Figure S11 and S12]. A) Average pooled profile of all active chromatin marks for expressed RTSSs and the selected subset of 6184 poised RTSSs. B) Average Pol II profile around expressed RTSSs, the subset of selected poised RTSSs and all repressed RTSSs.