For ChIP-seq, cells were crosslinked with formaldehyde (1% final) for 10min at room temperature, and harvested for sonication. Nuclei were extracted and chromatin was sheared to an average size of 200bp using a Covaris S220 sonicator For RNA-seq, polyA+ RNA was isolated by two rounds of polyA selection using the Life Technologies mRNADirect kit per manufacturer's recommendations. Sequencing libraries for ChIP-seq were constructed using the NEBNext Ultra kit as per manufacturer's recommended instructions. Sequencing libraries for polyA+, stranded-RNA-seq were constructed using the NEBnext Ultra Directional RNAseq kit as per manufacturer's recommended instructions.