4OEV:
reference: Promiscuous Nickel Import in Human Pathogens: Structure, Thermodynamics, and Evolution of Extracytoplasmic Nickel-Binding Proteins., Lebrette H, Brochier-Armanet C, Zambelli B, de Reuse H, Borezee-Durant E, Ciurli S, Cavazza C, Structure. 2014 Sep 3. pii: S0969-2126(14)00243-3. doi:, 10.1016/j.str.2014.07.012. PMID: 25199691

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