About the Authors

Almudena Pacheco

Affiliation Department of Biology, Drexel University, Philadelphia, Pennsylvania, United States of America

Jeffery L. Twiss

jeff.twiss@drexel.edu

Affiliation Department of Biology, Drexel University, Philadelphia, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Performed the experiments: AP. Analyzed the data: AP JLT. Wrote the paper: AP JLT.