Sorted cells were lysed in buffer (10mM Tris-HCl, 10mM NaCl 3mM MgCL2 and 0.1% IGEPAL) for 15 minutes at 4C, then centrifuged and re-suspended with transposase reaction mix (2x tagmented DNA buffer, transposase [Ilumina Nextera]), and nuclease-free water) and incubated for 30 min at 37 degrees. Cells were then added to MinElute column (Qiagen) and PCR amplified in KAPA HiFi 2x mix (Kapa Biosystems) with barcoding primers(Buenrostro et al., 2013) at 98C for 45 sec (45s) + 5 x at (98C for 15s + 63C for 30s + 72C for 30s) + 72C for 1 min. PCR products were cleaned with MinElute columns and size exclusion was performed with magJet NGS Cleanup and Size Selection kit (Thermo Fisher). Q-PCR library amplification test and PCR library amplification was performed as previously described(Buenrostro et al., 2015).