1DS7:
reference: Crystal structure of FMN-dependent nitroreductase from Escherichia coli B: a prodrug-activating enzyme., Parkinson GN, Skelly JV, Neidle S, J Med Chem. 2000 Oct 5;43(20):3624-31. PMID: 11020276

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