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. 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. mRNA was prepared using the RNeasy Plus kit (Qiagen) and reverse-transcribed using the iScript™ cDNA Synthesis Kit (Bio-Rad). For ChIP-seq, sequencing libraries were prepared using the Illumina TruSeq DNA Sample Preparation Kit according to the manufacturer's protocol. After adapter ligation DNA was PCR amplified with Illumina primers for 15 cycles and library fragments of ~250-450 bp (insert plus adaptor) were band isolated from an agarose gel. DNA fragments were sequenced using paired-end sequencing technology on Illumina HiSeq 2000 platform. For RNA-seq, samples were prepared as instructed using the TruSeq mRNA Sample Preparation Kit v2 (Illumina, San Diego, CA) in accordance with the manufacturer's instructions. After adapter ligation DNA was PCR amplified with Illumina primers for 15 cycles, DNA fragments were sequenced using single-end sequencing technology on Illumina paried-end on Illumina HiSeq2000 .