Binding of histone modifications and RNA pol II in highly repressed genes. ChIP-seq binding data for each of the histone marks are shown for select erythroid-specific genes known to be repressed during differentiation (Myb, Pu.1, Stat5a and -b, and the constitutively repressed HoxB gene cluster and Pax5). Light-colored peaks are in enriched CFU-Es, and dark-colored peaks in late erythroblasts. Numbers shown outside each graph are the scale of each graph (in normalized reads), and genomic scales (in kilobases) are shown for each gene above the set of graphs.