About the Authors

Laurent Abi-Rached

Affiliation Department of Structural Biology, Stanford University School of Medicine, Stanford, California, United States of America

Achim K. Moesta

Affiliation Department of Structural Biology, Stanford University School of Medicine, Stanford, California, United States of America

Raja Rajalingam

Affiliation UCLA Immunogenetics Center, Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, University of California Los Angeles, Los Angeles, California, United States of America

Lisbeth A. Guethlein

Affiliation Department of Structural Biology, Stanford University School of Medicine, Stanford, California, United States of America

Peter Parham

peropa@stanford.edu

Affiliation Department of Structural Biology, Stanford University School of Medicine, Stanford, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LAR PP. Performed the experiments: LAR. Analyzed the data: LAR. Wrote the paper: LAR PP. Contributed to the MHC analysis and KIR typing study: AKM. Contributed to the chimpanzee KIR typing analysis: RR. Contributed to the analysis of the KIR genomic sequences and to the human-chimpanzee haplotype comparisons: LAG.