1Q94:
reference: Structures of HLA-A*1101 complexed with immunodominant nonamer and decamer HIV-1 epitopes clearly reveal the presence of a middle, secondary anchor residue., Li L, Bouvier M, J Immunol 2004 May 15;172(10):6175-84. PMID: 15128805

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