The top 10 most abundant isomiR species with 3′ additions in the three samples.

“Start-end (ref)” shows start-end sites on corresponding precursor including 3′ non-template nucleotide, and “ref” shows reference start-end sites on the precursor in the miRBase database. Empty “ref” shows consistent location. If specific miRNA has multicopy precursors, we here default the first miRNA precursor.

“带参考标识（ref）的起始-终止位点”指对应miRNA前体序列上的起始与终止位点，包含3'端非模板核苷酸；其中“ref”指代miRBase数据库中该前体序列的参考起始-终止位点。当“ref”字段为空时，表明该位点与参考位点位置一致。若某一微小RNA（microRNA, miRNA）存在多个拷贝的前体序列，则本数据集默认选取首个前体序列。