Average H3K4me2 binding showing clusters from K-means clustering of WB in the extended TSS region. A: K-means clustering on the entire gene sets, K=7. B: Further K-means clustering within cluster 2. K=4. The cluster on the lower left of Panel B containing 356 genes was further studied. X-axis is the coordinates of the extended TSS region with 0 denoted the TSS. Y-axis is the binding reads counts. The region extends to +/- 10kbp of TSS. WB: whole brain.