About the Authors
Institute for Cellular and Molecular Biology, Center for Systems and Synthetic Biology, and Section of Molecular Genetics and Microbiology, University of Texas at Austin, Austin, Texas, United States of America
Michael Smith Genome Sciences Center, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
The authors have declared that no competing interests exist.
SS performed the experiments and wrote the paper. AB analyzed the data and contributed reagents/materials/analysis tools. YZ, SJ, and MH contributed reagents/materials/analysis tools. VRI conceived and designed the experiments and wrote the paper.