It is similar to microRNA (miRNA) and the structure is short and well-defined, usually between 20 and 24 base pairs or thereabouts. Their structure has hydroxylated 3’ and phosphorylated 5’ ends.

Shen, J. et al., Patel, D. J. & Hung, M. C. (2013). EGFR modulates miRNA maturation in response to hypoxia through phosphorylation of Ago2. Nature 497, 383-387. Viral Suppressors. Viruses have ...