3QE8:
reference: Post-protein-binding reactivity and modifications of the fac-[Re(CO)3]+ core., Zobi F, Spingler B, Inorg Chem. 2012 Feb 6;51(3):1210-2. Epub 2012 Jan 9. PMID: 22229733

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