title: GSM8334237: WT_iEμ_1; Mus musculus; OTHER
library_construction_protocol: About 10 million cells were crosslinked with 2% formaldehyde for 10 minutes at room temperature and quenched with glycine at a final concentration of 125 mM. Then, the crosslinked cells were lysed in the 3C lysis buffer (50 mM Tris-HCl, pH 7.5, 150 mM NaCl, 5 mM EDTA, 0.5% NP-40, 1% Triton X-100, protease inhibitors) and nuclei were digested with DpnⅡ enzyme (NEB, R0543) at 37 ℃ overnight.  They were then brought to 16℃, 100U of T4 ligase added  (Promega, M1801) and they incubated again overnight at 16℃.  The ligated products were de-crosslinked with Proteinase K (Roche, #03115852001) at 56 ℃ overnight and the 3C templates were purified by phenol/chloroform. Libraries were prepared using 3C samples by HTGTS (Jane et al., 2018).