About the Authors
Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
The authors have declared that no competing interests exist.
MJW and TMR conceived and designed the experiments. MJW and GBR performed the experiments. MJW, GBR, and TMR analyzed the data. GBR contributed reagents/materials/analysis tools. MJW and TMR wrote the paper.