4QT5:
reference: Crystal structure of a TSH receptor monoclonal antibody: insight into Graves' disease pathogenesis., Chen CR, Hubbard PA, Salazar LM, McLachlan SM, Murali R, Rapoport B, Mol Endocrinol. 2015 Jan;29(1):99-107. doi: 10.1210/me.2014-1257. PMID: 25419797

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