1. Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
2. Department of Cellular and Molecular Pharmacology, University of California San Francisco, San Francisco, California 94158, United States
3. Chemistry and Chemical Biology Graduate Program, University of California San Francisco, San Francisco, California 94158, United States
4. Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California 94158, United States
5. Quantitative Biosciences Institute, University of California San Francisco, San Francisco, California 94158, United States
6. Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States
7. Department of Cell and Developmental Biology, Northwestern University, Evanston, Illinois 60208, United States