Coronavirus 3′ stem-loop II-like motif (s2m)

The Coronavirus 3′ stem-loop II-like motif (also known as s2m) is a secondary structure motif identified in the 3′ untranslated region (3′UTR) of astrovirus, coronavirus and equine rhinovirus genomes. Its function is unknown, but various viral 3′ UTR regions have been found to play roles in viral replication and packaging.

Source: Wikipedia — Coronavirus 3′ stem-loop II-like motif (s2m) (CC BY-SA 4.0)