GSM8329526
RNA was isolated by BGI genomics using the Qiagen RNeasy Plus kit. As provided by the company that performed the sequencing (BGI Genomics): 1) mRNA enrichment and purification: 1) Oligo dT Selection (mRNA enrichment): Use oligo dT beads to enrich mRNA with poly A tail. 2) RNA fragment and reverse transcription: Fragment the RNA and first-strand cDNA was generated using random N6-primed reverse transcription, followed by a second-strand cDNA synthesis with dUTP instead of dTTP. 3) End repair, add A and adaptor ligation: The synthesized cDNA was subjected to end-repair and then was 3' adenylated. Adaptors were ligated to the ends of these 3' adenylated cDNA fragments. 4) PCR amplification: Prior to PCR amplification, the dUTP-marked strand is selectively degraded by Uracil-DNA-Glycosylase(UDG). The remaining strand is amplified to generate a cDNA library suitable for sequencing. Many rounds of PCR amplification were performed to enrich the purified cDNA template using PCR primer. 5) Single strand separation and cyclization: Denature the PCR product by heat and the single strand DNA is cyclized by splint oligo and DNA ligase. 6) DNA nanoball synthesis.