3FJT:
reference: Structural characterization of a human Fc fragment engineered for extended serum half-life., Oganesyan V, Damschroder MM, Woods RM, Cook KE, Wu H, Dall'acqua WF, Mol Immunol. 2009 Feb 26. PMID: 19250681

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