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Peptide presented in HLA B27. The figure shows a peptide antigen in blue, usually 8–10 amino acids long, present in the pocket of HLA-B27 molecule for presentation to CD8+cytotoxic T cells specific for that peptide antigen. The letter N denotes the amino terminus (end point) and C stands for the carboxy terminus of the bound peptide. The numbers indicate the locations of important amino acids of HLA-B27 molecules. (From: Khan84 2005).
