About the Authors

Katharine G. Harris

Affiliation Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Carolyn B. Coyne

coynec2@pitt.edu

Affiliation Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KGH CBC. Performed the experiments: KGH. Analyzed the data: KGH CBC. Wrote the paper: KGH CBC.