ACKNOWLEDGMENTS
We thank the assistance and services provided at the Robert P. Apkarian
Integrated Electron Microscopy Core (IEMC) at Emory University. This
research was partly supported by the National Cancer Institute’s
National Cryo-EM Facility at the Frederick National Laboratory for
Cancer Research under contract 75N91019D00024. This project was
supported in part by an appointment to the Research Participation
Program at the Centers for Disease Control and Prevention, administered
by the Oak Ridge Institute for Science and Education through an
interagency agreement between the U.S. Department of Energy and CDC. The
findings and conclusions in this report are those of the authors and do
not necessarily represent the official position of the U.S. Centers for
Disease Control and Prevention or the Agency for Toxic Substances and
Disease Registry.