About the Authors

Min Ni

Affiliations Department of Bacteriology, University of Wisconsin, Madison, Wisconsin, United States of America, Department of Genetics, University of Wisconsin, Madison, Wisconsin, United States of America

Jae-Hyuk Yu

To whom correspondence should be addressed. E-mail: jyu1@wisc.edu

Affiliations Department of Bacteriology, University of Wisconsin, Madison, Wisconsin, United States of America, Department of Genetics, University of Wisconsin, Madison, Wisconsin, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JY MN. Performed the experiments: MN. Analyzed the data: JY MN. Contributed reagents/materials/analysis tools: MN. Wrote the paper: JY MN.