4DZ0:
reference: Re-engineering protein interfaces yields copper-inducible ferritin cage assembly., Huard DJ, Kane KM, Tezcan FA, Nat Chem Biol. 2013 Jan 20. doi: 10.1038/nchembio.1163. PMID: 23340339

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