
Figure 2.
Co-occurrence of input-normalized histone modification near the promoters (0–2000 bp) in human islets: (A) H3K4me2 vs. H3K4me1, (B) H3K4me3 vs. H3K4me2, (C) H3K4me3 vs. H3K4me1, and (D) H3K27me3 vs. H3K4me3. (A–C) The H3K4me1,2,3 series tends to either be completely absent (values near 1), or to co-occur (values near the diagonal). (D) H3K27me3 and H4K4me3 tend not to co-occur, with a few exceptions (bivalent genes).











