1. Laboratory of Molecular Immunology, The Rockefeller University, New York, NY 10065, USA.
2. Charité Universitätsmedizin, D-10117 Berlin, Germany.
3. Laboratory of Mass Spectrometry and Gaseous Ion Chemistry, The Rockefeller University, New York, NY 10065, USA.
4. Division of Biology, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA.
5. Department of Biology, Chemistry, and Pharmacy, Freie Universität Berlin, D14195 Berlin, Germany.
6. Rockefeller University Hospital, The Rockefeller University, New York, NY10065, USA.
7. Bone Marrow Transplant Service, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.
8. Department of Immunology and Microbial Science and IAVI Neutralizing Antibody Center, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
9. International AIDS Vaccine Initiative, New York, NY 10028, USA.
10. Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA 02129, USA.
11. Partners AIDS Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA.
12. Howard Hughes Medical Institute.
13. Beth Israel Deaconess Medical Center, Boston, MA 02215, USA.