1CSL:
reference: The structure of the HIV-1 RRE high affinity rev binding site at 1.6 A resolution., Ippolito JA, Steitz TA, J Mol Biol 2000 Jan 28;295(4):711-7. PMID: 10656783

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