4HX1:
reference: Structural basis for the differential classification of HLA-A*6802 and HLA-A*6801 into the A2 and A3 supertypes., Niu L, Cheng H, Zhang S, Tan S, Zhang Y, Qi J, Liu J, Gao GF, Mol Immunol. 2013 Oct;55(3-4):381-92. doi: 10.1016/j.molimm.2013.03.015. Epub, 2013 Apr 6. PMID: 23566939

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