Additional file 2.

Composite plots show H3 distribution across K4me3-only, bivalent (PRC1-positive and PRC1-negative) or no-mark TSSs (±2.5 kb). Nucleosome-deficient regions are observed at K4me3-only and bivalent promoters, but not at no-mark promoters.

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Ku et al. Genome Biology 2012 13:R85   doi:10.1186/gb-2012-13-10-r85