Figure 3. Distribution of DREF binding regions in the genome. (A) Distribution of DREF binding sites with respect to gene features. (B) DREF tag enrichment around transcription start sites (TSSs) of DREF-bound genes. (C) Histogram indicating the fraction of DREF and BEAF-32 bound genes and their gene expression levels in wing imaginal tissue. The percentages refer to the fraction of BEAF-32-bound genes within each class. Class I corresponds to the 25% most highly transcribed genes, whereas class 4 corresponds to the lowest 25%.