2ORF:
reference: Directing macromolecular conformation through halogen bonds., Voth AR, Hays FA, Ho PS, Proc Natl Acad Sci U S A. 2007 Apr 10;104(15):6188-93. Epub 2007 Mar 22. PMID: 17379665

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