Cells were crosslinked with formaldehyde and lysed to obtain purified nuclei that were sonicated to shear chromatin. Protein-DNA complexes were then isolated using Dynabeads with corresponding antibodies, and DNA was isolated through reverse crosslinking and purified by phenol chloroform extraction in order to be used for library construction. Libraries were prepared using the NEBNext Ultra II DNA Library Prep Kit from NEB (E7645), according to the manufacturer’s protocol.