library_construction_protocol: ChIP libraries: IP of crosslinked (1% formaldehyde, 15 min) sonycated lysate, followed by decrosslinking and protein and RNA degradation. DNA library construction with NEBNext Ultra II DNA Library Prep Kit for Illumina kit (NEB). Nascent RNA: RNA was labeled with 4 Thiouracil (Sigma), extracted, after removal of DNA was treated EZ-Link HPDP-Biotin (Thermo Scientific). Labeled RNA was recovered using streptavidin beads (Roche). RNA libraries were prepared with NEBnext Ultra Directional RNA Library Prep Kit for Illumina (NEB). Total RNA was  isolated applying the hot phenol method. RNA libraries were prepared with NEBnext Ultra Directional RNA Library Prep Kit for Illumina (NEB). Libraries were prepared using NEBnext Ultra Directional RNA or DNA Ultra II Library Prep Kit for Illumina (NEB), following the manufacturer instruction.