3QDL:
reference: Structure of RdxA: an oxygen insensitive nitroreductase essential for metronidazole activation in Helicobacter pylori., Martinez-Julvez M, Rojas AL, Olekhnovich I, Angarica VE, Hoffman PS, Sancho J, FEBS J. 2012 Oct 8. doi: 10.1111/febs.12020. PMID: 23039228

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