2W4B:
reference: A Bridge Crosses the Active-Site Canyon of the Epstein-Barr Virus Nuclease with DNase and RNase Activities., Buisson M, Geoui T, Flot D, Tarbouriech N, Ressing ME, Wiertz EJ, Burmeister WP, J Mol Biol. 2009 Jun 16. PMID: 19538972

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