I can't watch it right now but IIRC this (amazing) video of the life cycle of an HIV viral particle demonstrates an RNA that forms a ring: https://vimeo.com/26

I can't watch it right now but IIRC this (amazing) video of the life cycle of an HIV viral particle demonstrates an RNA that forms a ring: https://vimeo.com/260291607 https://vimeo.com/260291607