1. Broad Institute of MIT and Harvard, Cambridge, 415 Main Street, Cambridge, Massachusetts 02142, United States
2. Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States
3. Interdisciplinary Biological Sciences Program, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States
4. Chemistry of Life Processes Institute, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States
5. Center for Synthetic Biology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States