Promoter complexes across cancer cell lines.

Occupancy levels for TFIIB linked to RefSeq TSSs (within 500 bp) in the indicated cell type were normalized by column. The color scales represent the range of average-centered, log2 transformed values within each respective column. Detection in all four cell types define Group 1. Groups 2–4 were parsed by k-means clustering. Rows were sorted within groups based on TFIIB occupancy averaged across the four cell types (yellow-black-cyan-gray, denote high, medium, low, and zero occupancy, respectively). The number of genes in each cluster group are indicated to the left.