About the Authors
Department of Biological Science and Institute of Molecular Biophysics, Florida State University, Tallahassee, Florida, United States of America
Center for Structural and Molecular Biology and National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Chaoyang District, Beijing, China
AIDS Vaccine Program, SAIC Frederick, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: KAT KHR. Performed the experiments: PZ. Analyzed the data: PZ HW KAT. Contributed reagents/materials/analysis tools: EC. Wrote the paper: KHR.