1I1Y:
reference: The structural basis for the increased immunogenicity of two HIV-reverse transcriptase peptide variant/class I major histocompatibility complexes., Kirksey TJ, Pogue-Caley RR, Frelinger JA, Collins EJ, J Biol Chem 1999 Dec 24;274(52):37259-64. PMID: 10601290

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