About the Authors
Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, Massachusetts, United States of America
Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: BWD RWB LAS JJM. Performed the experiments: BWD RWB NMD TAIG. Analyzed the data: BWD RWB NMD TAIG LAS JJM. Contributed reagents/materials/analysis tools: BWD RWB LAS JJM. Wrote the paper: BWD RWB TAIG LAS JJM.