H3K4me3 clusters at promoters. A: Heat map representation of H3K4me3 enrichment in WT, each line represents a single promoter. X-axis shows distance from TSS in bp and regions are aligned such that the direction of transcription is from left to right. Promoters are sorted by cluster membership. B Averaged H3K4m3 profiles for cluster 10, 11 and 18. C Averaged Pol II profiles for the same clusters.