Total RNA of each sample was extracted using an SV Total RNA Isolation System (Promega Z3100) and treated with Rnase-free Dnase I (Promega). The quality and quantity of 24 RNA samples were analyzed, RNA libraries were constructed and sequenced as described45 (link)46 (link). Raw sequencing data were generated using an Illumina HiSeq 2000 system and have been deposited in the NCBI Short Read Archive.
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