You're likely familiar with RNA, the molecule that plays an important role in protein production and gene expression control. Perhaps you're less familiar, however, with PIWI-interacting RNA (piRNA), ...
image: piRNA biogenesis pathway in the Drosophila germline. The Drosophila ovary has 16–20 ovarioles containing 14 different developmental stages of egg chambers. The piRNA precursors transcribed in ...