title: GSM5231135: Mix_circRNA; Brassica rapa subsp. pekinensis; RNA-Seq
library_construction_protocol: Total RNA was extracted using Trizol reagent (Invitrogen, CA, USA) following the manufacturer's procedure. The total RNA quantity and purity were analysis of Aglient 2100 Bioanalyzer and RNA 6000 Nano LabChip Kit (Agilent, CA, USA) with RIN number >7.0. Approximately 10 ug of total RNA was used to deplete ribosomal RNA according to the manuscript of the Ribo-Zero™ rRNA removal kit (Illumina, San Diego, USA).Then the left RNA was fragmented into small pieces using divalent cations under elevated temperature. The cleaved RNA fragments were reverse-transcribed to create the final cDNA library in accordance with the protocol for the Truseq Stranded Total RNA HT Sample Prep Kit (Illumina, San Diego, USA).