20-24 nt
*small nucleolar RNA/snoRNA
*Piwi-interacting RNA/piRNA: 24-31 nt. They interact with Piwi proteins of the Argonaute family and have a function in targeting and cleaving transposons.
*enhancer RNA/eRNA:

Scope of study

In the human genome, all genes get transcribed into RNA because that's how the molecular