Figure 4.
MYC stimulates histone H3 acetylation and inhibits H3K27 trimethylation but does not modulate H3K4 trimethylation. (A)–(F) P493-6 B cells were treated as described in the legend to Figure 3. ChIP was performed with antibodies against H3K4me3 (A), H3ac (B), H3K9ac (C), H3K27ac (D), H3K27me3 (E) and CBP/p300 (F). (G) Sequential ChIP was carried out by first immunoprecipitating MYC-containing complexes, followed by a second ChIP with antibodies against H3ac, H3K9ac, H3K27ac, H3K4me3, H3K27me3, or IgG control. The DNA fragments were amplified by qPCR with the primers indicated in the scheme. Error bars represent s.d. of PCR triplicates.