5J8G:
reference: Mechanism-Informed Refinement Reveals Altered Substrate-Binding Mode for Catalytically Competent Nitroreductase., Pitsawong W, Haynes CA, Koder RL Jr, Rodgers DW, Miller AF, Structure. 2017 Jul 5;25(7):978-987.e4. doi: 10.1016/j.str.2017.05.002. Epub 2017, Jun 1. PMID: 28578873

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