2HLA:
reference: Specificity pockets for the side chains of peptide antigens in HLA-Aw68., Garrett TP, Saper MA, Bjorkman PJ, Strominger JL, Wiley DC, Nature 1989 Dec 7;342(6250):692-6. PMID: 2594067

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