4UAM:
reference: Iron(III) Located in the Dinuclear Metallo-beta-Lactamase IMP-1 by Pseudocontact Shifts., Carruthers TJ, Carr PD, Loh CT, Jackson CJ, Otting G, Angew Chem Int Ed Engl. 2014 Oct 15. doi: 10.1002/anie.201408693. PMID: 25320022

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