3C5J:
reference: The structure of HLA-DR52c: comparison to other HLA-DRB3 alleles., Dai S, Crawford F, Marrack P, Kappler JW, Proc Natl Acad Sci U S A. 2008 Aug 19;105(33):11893-7. Epub 2008 Aug 12. PMID: 18697946

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