U87FO cells were processed according to Myers Lab ChIP-seq Protocol v041610.2. BT168FO cells were processed through the MAGnify Chromatin Immunoprecipitation System (Thermo Fisher). Libraries were prepared at the Istituto di Genomica Applicata (IGA) in Udine (http://www.appliedgenomics.org/) according to Illumina TruSeq DNA Sample Preparation Guide