H3K4me3 association with HERV-H proviruses, as measured with the F score, in 40 different cell types, as a function of the distance from the marker. The F score is reported on the z-axis. Cell types are listed on the x-axis, while the window size is reported on the y-axis. Yellow to red bands indicate a significant association (F score >0.5). Significance decreases as the color shifts from red to blue. 12 out of 15 of the cell types with significant F scores are either human ES cells or iPS cells.