title: GSM6641904: RNA_mESC_GFP_rep1; Mus musculus; RNA-Seq
library_construction_protocol: For embryos, the zona pellucida was gently removed by treatment with Tyrode's solution (Sigma, T1844). Then the embryos were lysed in lysis buffer containing RNase inhibitor. 2i ESCs were lysed in lysis buffer containing RNase inhibitor. The following steps followed the Smart-seq2 protocol as previously described (Picelli et al., 2014). For whole genome sequence, the tail tip DNA were extracted with isopropanol precipitation method. The Smart-seq2 libraries of embryos were prepared as previously described (Picelli et al., 2014). Embryos were lysed in lysis buffer containing RNase inhibitor according to the user manual. The library was quantified using Qubit and Agilent 2100 before being subjected to sequencing. For stacc-seq, the library was prepared following the protocol as descripted before (Liu et al., 2020). For ATAC-seq,  the library was prepared following the protocol as descripted before (Buenrostro et al., 2013; Wu ET AL., 2016). The Smart-seq2, WGS (Picelli et al., 2014) and stacc-seq (Liu et al., 2020) library strategies were followed the protocols described.