3OPZ:
reference: Trypanosoma cruzi trans-sialidase in complex with a neutralizing antibody: structure/function studies towards the rational design of inhibitors., Buschiazzo A, Muia R, Larrieux N, Pitcovsky T, Mucci J, Campetella O, PLoS Pathog. 2012 Jan;8(1):e1002474. Epub 2012 Jan 5. PMID: 22241998

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