1. Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
2. Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
3. Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
4. Department of Molecular and Cellular Biology, University of California-Davis, Davis, California 95616, United States
5. Cellular and Molecular Biology Program, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
6. Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109, United States