About the Authors

Song Li, Sarah M Assmann
Biology Department, Pennsylvania State University, University Park, Pennsylvania, United States of America

Réka Albert
Physics Department, Pennsylvania State University, University Park, Pennsylvania, United States of America

Corresponding Author

ralbert@phys.psu.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

SL, SMA, and RA conceived and designed the experiments. SL performed the experiments. SL and RA analyzed the data. SL, SMA, and RA wrote the paper.