5IRO:
reference: Structure of the Adenovirus Type 4 (Species E) E3-19K/HLA-A2 Complex Reveals Species-Specific Features in MHC Class I Recognition., Li L, Santarsiero BD, Bouvier M, J Immunol. 2016 Aug 15;197(4):1399-407. doi: 10.4049/jimmunol.1600541. Epub 2016 , Jul 6. PMID: 27385781

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