title: GSM6065970: EVT_D8_rep1; Homo sapiens; RNA-Seq
library_construction_protocol: Total RNA was extracted with TRIzol Reagent (Thermo Fisher) and was subjected to extract with Direct-zol RNA Microprep kit (Zymo research) Next generation sequencing library preparations were constructed according to the manufacturer's protocol (VAHTS mRNA-seq V2 Library Prep Kit for Illumina). The mRNA fragmentation and priming was performed using VAHTSFirst Strand Synthesis Reaction Buffer and VAHTS Random Primers. First strand cDNA was synthesized using ProtoScript II Reverse Transcriptase and the second-strand cDNA was synthesized using Second Strand Synthesis Enzyme Mix. The purified double-stranded cDNA（byAxyPrep Mag PCR Clean-up (Axygen)was then treated with End Prep Enzyme Mix to repair both ends and add a dA-tailing in one reaction, followed by a T-A ligation to add adaptors to both ends. Size selection of Adaptor-ligated DNA was then performed using AxyPrep Mag PCR Clean-up (Axygen), and fragments of ~360 bp (with the approximate insert size of 300 bp) were recovered. Each sample was then amplified by PCR for 11 cycles using P5 and P7 primers, with both primers carrying sequences which can anneal with flow cell to perform bridge PCR and P7 primer carrying a six-base index allowing for multiplexing. The PCR products were cleaned up using AxyPrep Mag PCR Clean-up (Axygen), validated using an Agilent 2100 Bioanalyzer (Agilent Technologies, Palo Alto, CA, USA), and quantified by Qubit 2.0 Fluorometer (Invitrogen, Carlsbad, CA, USA).