2GIY:
reference: Crystal Structure of the HSV-1 Fc Receptor Bound to Fc Reveals a Mechanism for Antibody Bipolar Bridging., Sprague ER, Wang C, Baker D, Bjorkman PJ, PLoS Biol. 2006 May 2;4(6):e148. PMID: 16646632

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