6CF2:
reference: Structure of an RNA Aptamer that Can Inhibit HIV-1 by Blocking Rev-Cognate RNA (RRE) Binding and Rev-Rev Association., Dearborn AD, Eren E, Watts NR, Palmer IW, Kaufman JD, Steven AC, Wingfield PT, Structure. 2018 Jun 14. pii: S0969-2126(18)30207-7. doi:, 10.1016/j.str.2018.06.001. PMID: 30017564

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).