5M4O:
reference: The crystal structures of native hydroquinone 1,2-dioxygenase from Sphingomonas sp. TTNP3 and of substrate and inhibitor complexes., Ferraroni M, Da Vela S, Kolvenbach BA, Corvini PF, Scozzafava A, Biochim Biophys Acta. 2017 May;1865(5):520-530. doi:, 10.1016/j.bbapap.2017.02.013. Epub 2017 Feb 20. PMID: 28232026

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