Cells were crosslinked by formaldehyde and lysated by SDS lysis buffer. Sonicated nuclei were incubated with antibody overnight and then pulled down by dynabeads. After washing, decrosslinking was performed to isolate DNA. Samples were amplified using NEBNext Q5 Hot Start HiFi PCR Master Mix. The concentration of samples was checked using PicoGreen and median fragment size was checked using the Agilent D1000 screentape on the Agilent Technologies 2200 TapeStation. Samples were sequenced single end or paired, as specified, on Illumina HiSeq 2500.