1 Integrated Program in Cellular, Molecular, and Biomedical Studies, Columbia University, New York, NY, United States.
2 National Resource for Automated Molecular Microscopy, Simons Electron Microscopy Center, New York Structural Biology Center, New York, NY, United States.
3 School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, United States.
4 School of Biological Sciences, Georgia Institute of Technology, Atlanta, GAUnited States.