About the Authors

Fan Ge, Li-San Wang, Junhyong Kim
Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Corresponding Author

Junhyong@sas.upenn.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JK conceived and designed the experiments. FG and LSW performed the experiments and analyzed the data. FG and JK wrote the paper.