Figure 3.

piRNA genomic source classification. (A) Average proportion of piRNA reads from all situations. (B) piRNA read origins per sample. (C) Ribosomal RNA read analyses by different rRNA origins of detected rRNA-piRNA expression. An important number of piRNAs originates from different functional molecules such as rRNAs, tRNAs or snoRNAs. Specifically, the high expression of distinct piRNAs rRNA-derived could have a regulatory role at development.