harvesting protocol: ChIP samples harvested after fixation, sonicated, processed and ChIP-enriched via standard protocols (iDeal ChIP-seq kit for Transcription Factors, Diagenode). DNA was extracted from ChIP-seq samples prepared following the iDeal ChIP-seq kit for Transcription Factors (Diagenode) protocol. Standard Illumina barcodes were introduced during library preparation with the Illumina TruSeq ChIP Sample Prep Kit 48 Samples - Set A Cat# IP-202-1012