1. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
2. Biophysics Program, School of Medicine, Stanford University, Stanford, California 94305, United States
3. Department of Bioengineering, Stanford University, Stanford, California 94305, United States
4. Division of CryoEM and Bioimaging, SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
5. Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, California 90095, United States
6. Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States