ChIP-seq were performed following the protocol: Using ChIP-seq technology to generate high-resolution profiles of histone modifications. O'Geen H, Echipare L, Farnham PJ. Methods Mol Biol. 2011;791:265-86. doi: 10.1007/978-1-61779-316-5_20. Library was contracted by the MD Anderson DNA sequencing Core facility following standard protocol.