2BMR:
reference: Structural insight into the dioxygenation of nitroarene compounds: the crystal structure of nitrobenzene dioxygenase., Friemann R, Ivkovic-Jensen MM, Lessner DJ, Yu CL, Gibson DT, Parales RE, Eklund H, Ramaswamy S, J Mol Biol. 2005 May 20;348(5):1139-51. Epub 2005 Apr 7. PMID: 15854650

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