1. Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5G 1M1, Canada
2. 5Metis, Inc., 5 Laboratory Drive, Ste. 2175, Durham, North Carolina 27709, United States
3. Boragen, Inc., 5 Laboratory Drive, Ste. 2150, Durham, North Carolina 27709, United States
4. David Braley Centre for Antibiotics Discovery, M.G. DeGroote Institute for Infectious Disease Research, Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario L8S 4K1, Canada