About the Authors

Madelyn M. Shapiro

Affiliation Department of Microbiology, University of Illinois, Urbana, Illinois, United States of America

Vandana Chakravartty

Affiliation Department of Microbiology, University of Illinois, Urbana, Illinois, United States of America

John E. Cronan

j-cronan@life.uiuc.edu

Affiliations Department of Microbiology, University of Illinois, Urbana, Illinois, United States of America, Department of Biochemistry, University of Illinois, Urbana, Illinois, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MMS JEC. Performed the experiments: MMS VC. Analyzed the data: MMS JEC VC. Contributed reagents/materials/analysis tools: MMS. Wrote the paper: MMS JEC.