For ChIP-seq, nuclei was isolated from cells fixed with 1% Formaldehyde. Next, chromatin was fragmented into ~250bp. Chromatin immunoprecipitation was performed with the indicated antibodies. For RNA-seq, total RNA was isolated with RNAeasy (Qiagen) and reverse transcribed using Superscript III and random hexamers (Life Technologies) to synthesize the 1st strand. Second strand was synthesized with dUTP to generate strand asymmetry using DNA Pol I (NEB, M0209L) and the E. coli ligase (Enzymatics, L6090L). For ChIP-seq and RNA-seq, libraries were prepared by standard protocol. First, fragments are repaired to generate blunt 5' P ends using 'EndIT DNA End Repair kit' (Epicentre). Second, 3' A overhang was generated using 'Klenow Fragment (3´→ 5´ exo-)' (NEB). Third, Illumina barcodes were ligated using 'Rapid T4 DNA Ligase' (Enzymatics). Lastly, libraries were size selected using 'Ampure beads' (Beckman Coulter), then amplified, quantified and pooled.