(A) BMMΦs were stimulated for 1 hour with LPS and analyzed by ChIP (Brd4). (B, C) BMMΦs were analyzed by ChIP (H3K9Ac, H4K5Ac, H4K8Ac, H4K12Ac). (D) BMMΦs were stimulated for 1 hour with LPS and analyzed by ChIP (H4K5Ac, H4K8Ac, H4K12Ac). (E) Histone peptide binding assays were performed with GST fusion proteins of bromodomain 1 or 2 of Brd4 (BD1, BD2) and either no peptide, AcH4 peptide, or unmodified H4 peptide. Reactions were analyzed by Western blotting with anti-GST. (F) BMMΦs were stimulated for 1 hour with LPS and analyzed by ChIP (p300/CBP, PCAF, GCN5). (G) Schematic of the H4 tail. (A–F) Data are representative of 3 or more independent experiments. Error bars represent mean+/−SEM.