4J3P:
reference: The crystal structure of an extracellular catechol oxidase from the ascomycete fungus Aspergillus oryzae., Hakulinen N, Gasparetti C, Kaljunen H, Kruus K, Rouvinen J, J Biol Inorg Chem. 2013 Sep 17. PMID: 24043469

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