2KWG:
reference: Solution-state structure of a fully alternately 2'-F/2'-OMe modified 42-nt dimeric siRNA construct., Podbevsek P, Allerson CR, Bhat B, Plavec J, Nucleic Acids Res. 2010 Jul 12. PMID: 20624819

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