5GPE:
reference: Structural Basis for the Selective Pb(II) Recognition of Metalloregulatory Protein PbrR691., Huang S, Liu X, Wang D, Chen W, Hu Q, Wei T, Zhou W, Gan J, Chen H, Inorg Chem. 2016 Dec 19;55(24):12516-12519. Epub 2016 Nov 30. PMID: 27989185

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