Nuclei were isolated from frozen tissue in accordance with protocol dx.doi.org/10.17504/protocols.io.6t8herw. After isolation, nuclei were cryopreserved in BAM Banker (Wako Chemicals) and stored at -80°C for use in other assays such as scATAC-seq and HiChIP. Transposed fragments were purified and amplified as described previously (Buenrostro et al., Nature Methods 2015) with slight modification. Briefly, transposed fragments were pre-amplified for 3 cycles. Concentration of pre-amplified fragments was determined by qPCR and this concentration was used to estimate the total number of cycles required to obtain 160 femtomoles of fragments. A second PCR was performed to amplify the pre-amplified fragments for the desired number of cycles. Final libraries were again purified. Prior to sequencing, libraries were pooled and run on a 6% PAGE gel and excess primers and primer dimers below 125 bp were removed. Nuclei were isolated from frozen tissue in accordance with protocol dx.doi.org/10.17504/protocols.io.6t8herw. After isolation, nuclei were cryopreserved in BAM Banker (Wako Chemicals) and stored at -80°C for use in other assays such as scATAC-seq and HiChIP.