Histone acetylation marks correlate with Brd4 gene marking on mitotic cells. ChIP analysis was performed with antibody against di-acetyl H3 (K9, 14), tetra-acetyl H4 (K5, 8, 12, and 16), and H3K4me3 on the TSS of M/G1 genes. Dotted lines represent averaged values for normal IgG binding (SD, <0.01).