1 Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA. kanekiyom@nih.gov.
2 Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
3 Henry M. Jackson Foundation for the Advancement of Military Medicine, US Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, MD, USA.
4 Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
5 Biomedical Research Center, Qatar University, Doha, Qatar.
6 Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Victoria, Australia.
7 Vanderbilt Vaccine Center and Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA.
8 Electron Microscope Laboratory, Cancer Research Technology Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, USA.
9 Bioqual, Inc, Rockville, MD, USA.
10 Cryo-EM facility, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, MD, USA.
11 Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA. bgraham@nih.gov.
In the version of this article initially published, the labels (50 Å) above the scale bars in Fig. 1b were incorrect. The correct size is 50 nm. The error has been corrected in the HTML and PDF versions of the article.