About the Authors
Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, Minnesota, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: BJP KJS JME. Performed the experiments: BJP. Analyzed the data: BJP. Contributed reagents/materials/analysis tools: BJP KJS JME. Wrote the paper: BJP JME.