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. Other RNA families identified in the coronavirus include the , the coronavirus frameshifting stimulation element, the coronavirus packaging signal and the coronavirus 3′ UTR pseudoknot.