About the Authors

Xuan Wang

Affiliation Rosenstiel Center and Department of Biology, Brandeis University, Waltham, Massachusetts, United States of America

James E Haber

To whom correspondence should be addressed. E-mail: haber@brandeis.edu

Affiliation Rosenstiel Center and Department of Biology, Brandeis University, Waltham, Massachusetts, United States of America

Competing Interests

The authors have declared that no conflicts of interest exist.

Author Contributions

XW and JEH conceived and designed the experiments. XW performed the experiments. XW and JEH analyzed the data. XW and JEH wrote the paper.