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. 2013 Sep 1;27(17):1886–1902. doi: 10.1101/gad.221010.113

Figure 4.

Figure 4.

The bromodomains of Bdf2 are required for boundary function. (A) Schematic diagram of Bdf2 protein. The positions of mutations are indicated. (B) Peptide pull-down assays of the indicated recombinant proteins with biotinylated H4 tail (2–24) unmodified and tetra-acetylated at the K5, K8, K12, and K16 (Ac-H4) peptides as well as H3 tail (1–21) unmodified and diacetylated at the K9 and K14 (Ac-H3) peptides. (C) Serial dilution analysis to measure heterochromatin spreading outside of IRC1R∷ura4+. (D,E) ChIP analysis of H3K9me2 and Swi6 levels at IRC1R∷ura4+ and Bdf2-Flag levels at IRC1R and IRC3L, normalized to act1. The data are averages of three experiments, and error bars represent standard deviation. (F) Western blot analysis of Bdf2-Flag levels. (G) Schematic diagram of the L5-gbs-ura4+ reporter. (H) Serial dilution analysis to measure heterochromatin spreading to ura4+. All strains used contain epe1Δ to rule out the possibility that Bdf2 recruits Epe1 to establish heterochromatin boundaries. (I) ChIP analysis of H3K9me2 and Swi6 levels at L5-gbs-ura4+ and Bdf2-GBD levels at 3xgbs, normalized to act1. The data are averages of three experiments, and error bars represent standard deviation. All strains used contain epe1Δ.