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Schematic diagram of the 6.3HIP binding in the trimolecular complex. I-Ag7 binding pockets 1, 4, and 6 are occupied by insB-chain amino acids 14 (A), 17 (L) and 19 (C), respectively. ProSAAS amino acids 219 (S) and 221 (D) residue in pockets 7 and 9 of I-Ag7.
