About the Authors

Ana Shulla

Affiliation Department of Microbiology, The University of Chicago, Chicago, Illinois, United States of America

Glenn Randall

grandall@bsd.uchicago.edu

Affiliation Department of Microbiology, The University of Chicago, Chicago, Illinois, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AS GR. Performed the experiments: AS. Analyzed the data: AS. Wrote the paper: AS GR.