About the Authors
Howard Hughes Medical Institute, Programs in Gene Function and Expression and Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
The authors have declared that no competing interests exist.
TR and MRG conceived and designed the experiments. TR and SWGC performed the experiments. TR, SWGC, and MRG analyzed the data. TR and SWGC contributed reagents/materials/analysis tools. TR and MRG wrote the paper.