2AMJ:
reference: Modulator of Drug Activity B from Escherichia coli: Crystal Structure of a Prokaryotic Homologue of DT-diaphorase., Adams MA, Jia Z, J Mol Biol. 2006 Jun 2;359(2):455-65. Epub 2006 Apr 7. PMID: 16630630

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