About the Authors

Yihong Zhou

Affiliation Department of Biology, University of Vermont, Burlington, Vermont, United States of America

Sara Helms Cahan

scahan@uvm.edu

Affiliation Department of Biology, University of Vermont, Burlington, Vermont, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YZ SHC. Performed the experiments: YZ. Analyzed the data: YZ. Wrote the paper: YZ SHC.