library_construction_protocol: Total RNA was extracted using the RNeasy Mini Kit (Qiagen) according to the manufacturer's protocol. RNA concentration was detected by the Qubit RNA broad range assay in the Qubit Fluorometer (Invitrogen). After quality control by RNase free agarose gel and Agilent 2100 (Agilent Technologies, Palo Alto, CA, USA), RNA-Seq libraries were prepared using 200ng total RNA with the TruSeq RNA sample prep kit according to manufacturer's instructions (Illumina). RNA libraries were prepared for sequencing using standard Illumina protocols