Figure 1. The intensity distribution of four histone marks in U- and M-CGIs, and in their 1000bp flanking regions.
On the x-axis, fragments inside the two ‘0’s correspond to the CGIs, and other coordinates indicate the location in the flanking sequences. The y-axis measures the intensity of a specific histone modification. One can see that H3K4me1 (A), H3K4me2 (B), H3K4me3 (C) and H3K9me1 (D) are all differentially distributed between U-CGIs and M-CGIs.