library_construction_protocol: For ChIP-seq samples, cells were cross-linked with 1% formaldehyde for 8 minutes at room temperature. After washing, cells were sonicated with Diagenode Bioruptor in ChIP lysis buffer. Samples were cleaned up for immunoprecipitation using protein G agarose beads with antibodies of interest. Bound protein-DNA complexes were collected from beads and reverse crosslinked before being purified for DNA. Futher procedure details are described in the main associated article. The ChIP-seq libraries were constructed using the sparQ DNA Library Prep kit.