1E5K:
reference: Crystal structure of the molybdenum cofactor biosynthesis protein MobA from Escherichia coli at near-atomic resolution., Stevenson CE, Sargent F, Buchanan G, Palmer T, Lawson DM, Structure Fold Des 2000 Nov 15;8(11):1115-25. PMID: 11080634

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