1G3A: Structure Of Rna Duplexes (Cigcgicg)2
reference: Stability and structure of RNA duplexes containing isoguanosine and isocytidine., Chen X, Kierzek R, Turner DH, J Am Chem Soc 2001 Feb 21;123(7):1267-74. PMID: 11456697

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