3EOS:
reference: How to Replace the Residual Solvation Shell of Polar Active Site Residues to Achieve Nanomolar Inhibition of tRNA-Guanine Transglycosylase., Ritschel T, Kohler PC, Neudert G, Heine A, Diederich F, Klebe G, ChemMedChem. 2009 Dec;4(12):2012-23. PMID: 19894214

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