Figure 5: Conservation of epigenetic marks in constrained genes.

(a) Normalized histone modification profiles 1 kb around transcription start site (TSS) for H3K4me3 and H3K27ac, and around the TTS for H3K36me3 in constrained and unconstrained genes. (b) The difference in normalized average histone modification signals 1 kb around TSS (|Δlog Signal|) in constrained and unconstrained genes. (c) The cumulative distribution of the number of TF ChIP-seq peaks in promoter regions of human constrained and unconstrained genes. (d) Principal component analysis of ChIP-seq measured binding strength of TFs in constrained and unconstrained genes.