2AXF:
reference: The immunogenicity of a viral cytotoxic T cell epitope is controlled by its MHC-bound conformation., Tynan FE, Elhassen D, Purcell AW, Burrows JM, Borg NA, Miles JJ, Williamson NA, Green KJ, Tellam J, Kjer-Nielsen L, McCluskey J, Rossjohn J, Burrows SR, J Exp Med 2005 Nov 7;202(9):1249-60. PMID: 16275762

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