library_construction_protocol: Total RNA was extracted by RNeasy PowerPlant Kit (13500-50, Qiagen), DNA was removed via Turbo DNA-free kit (AM1907, Invitrogen). The libraries were prepared from 1 µg total RNA using KAPA mRNA Hyper Prep kit (KK8581, Roche) with KAPA Dual-indexed Adapter kit (KK8722, Roche). The libraries were pooled and sequenced by Hiseq 2500 (Illumina) with paired-end reads.