5AY4:
reference: High-Resolution Crystal Structure of Silver(I)-RNA Hybrid Duplex Containing Watson-Crick-like CSilver(I)C Metallo-Base Pairs., Kondo J, Tada Y, Dairaku T, Saneyoshi H, Okamoto I, Tanaka Y, Ono A, Angew Chem Int Ed Engl. 2015 Oct 8. doi: 10.1002/anie.201507894. PMID: 26448329

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