The clustering results of the conserved miRNAs based on their expression level pairwise comparison results of every two libraries.

<p>Red indicates that the miRNA has higher expression level in treatment sample, green indicates that the miRNA has higher expression in control sample and gray indicates that the miRNA has no expression in at least one sample. (CC2 represents CC; CX2 represents CX; CY2 represents CY). The expression profiles of some conserved miRNAs that had been detected with quantitative PCR (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032860#pone-0032860-g005" target="_blank">Figure 5</a>) were listed out on the right.