4O4Y:
reference: Structure and specificity of an antibody targeting a proteolytically-cleaved IgG hinge., Malia TJ, Teplyakov A, Brezski RJ, Luo J, Kinder M, Sweet RW, Almagro JC, Jordan RE, Gilliland GL, Proteins. 2014 Mar 17. doi: 10.1002/prot.24545. PMID: 24638881

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