BRD4 and breast cancer: Therefore we retrieved genome-wide profiles of H3K27Ac, ER, and BRD4 binding in MCF7 [25], compiled a similar list of enhancers (Table 1 and Additional file 22: Figure S6), and performed an enrichment analysis of association with BC risk on the BCAC GWAS (Fig. 2e and Additional file 22: Table S4).