1. Lewis Sigler Institute for Integrative Genomics, Princeton University, Princeton, New Jersey 08544, United States
2. Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
3. Department of Chemical Engineering and Applied Chemistry, Banting and Best Department of Medical Research, University of Toronto, Toronto, Ontario M5S 3E5, Canada
4. Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
5. Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, United States