5CMQ:
reference: A Metal Organic Framework with Spherical Protein Nodes: Rational Chemical Design of 3D Protein Crystals., Sontz PA, Bailey JB, Ahn S, Tezcan FA, J Am Chem Soc. 2015 Aug 25. PMID: 26305584

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