About the Authors

Wendy R. Hansen

Affiliation Biophysics Graduate Group, University of California, Berkeley, California, United States of America

Daniel A. Fletcher

*E-mail: fletch@berkeley.edu

Affiliations Biophysics Graduate Group, University of California, Berkeley, California, United States of America, Department of Bioengineering, University of California, Berkeley, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DF WH. Performed the experiments: WH. Analyzed the data: WH. Contributed reagents/materials/analysis tools: DF. Wrote the paper: DF WH.