2HF6:
reference: Solution structure of human zeta-COP: direct evidences for structural similarity between COP I and clathrin-adaptor coats., Yu W, Lin J, Jin C, Xia B, J Mol Biol. 2009 Mar 6;386(4):903-12. Epub 2009 Jan 10. PMID: 19167404

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