About the Authors

Dong Wang

¤ Current address: Department of Biological Sciences, Stanford University, Stanford, California, United States

Affiliation Developmental, Cell and Molecular Biology Group, Department of Biology, Duke University, Durham, North Carolina, United States of America

Nita Amornsiripanitch

Affiliation Developmental, Cell and Molecular Biology Group, Department of Biology, Duke University, Durham, North Carolina, United States of America

Xinnian Dong

To whom correspondence should be addressed. E-mail: xdong@duke.edu

Affiliation Developmental, Cell and Molecular Biology Group, Department of Biology, Duke University, Durham, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

DW and XD conceived and designed the experiments. DW and NA performed the experiments. DW and XD analyzed the data and wrote the paper.