4URP:
reference: Crystal structure of the fungal nitroreductase Frm2 from Saccharomyces cerevisiae., Song HN, Jeong DG, Bang SY, Paek SH, Park BC, Park SG, Woo EJ, Protein Sci. 2015 Apr 11. doi: 10.1002/pro.2686. PMID: 25864423

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