Lysates were clarified from sonicated nuclei and DNA complexes were isolated with antibody. ChIP and Input DNAs were prepared for amplification by converting overhangs into phosphorylated blunt ends and adding an adenine to the 3 -ends. Illumina genomic adapters were ligated and the sample was size-fractionated (200-300 bp) on a 2% agarose gel. After a final PCR amplification step (18 cycles), the resulting DNA libraries were quantified and sequenced on HiSeq 2000.