library_construction_protocol: Cells were fixed with 2% paraformaldehyde for 10 minutes. After quenching and cell lysis, chromatin was sonicated using a Bioruptor Pico (Diagenode) with 5 minutes of sonication with 30 seconds 'on' and 30 seconds 'off'. ChIP-seq libraries were prepared using the Diagenode MicroPlex Library Preparation Kit v3 and Diagenode Unique Dual Index sequence Set 1 barcodes. 10^6 cells were used as starting material for input and ip samples. Libraries were amplified using 8 cycles on the thermocycler. Post amplification libraries were size selected at 150-1000bp in length using Agencourt AMPure XP beads from Beckman Coulter. Libraries were validated using the Agilent High Sensitivity DNA Kit.