1L3D:
reference: Metal ions and flexibility in a viral RNA pseudoknot at atomic resolution., Egli M, Minasov G, Su L, Rich A, Proc Natl Acad Sci U S A 2002 Apr 2;99(7):4302-7. PMID: 11904368

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