KIR contact residues of rhesus macaque Bw4 molecules. (A) An amino acid alignment of the MHC class I α1 and α2 domains of HLA-B*5701 and Mamu-B*065:01, -B*007:01, -B*017:01, -B*022:01, B*041:01, B*056:01, and B*058:02 with the predicted KIR contact residues shaded based on the HLA-B*57:KIR3DL1*001 crystal structure (). (B) Crystal structure of HLA-B*57 (yellow) and bound peptide (cyan). Highlighted in red are positions important for recognition by Mamu-KIR3DL01 identified in this study: residues 76, 77, 80, 83, 142, and 149.