About the Authors

John E Wertz

To whom correspondence should be addressed. E-mail: john.wertz@yale.edu

¤ Current address: Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut, United States of America

Affiliation Department of Microbiology and Immunology, New York Medical College, Valhalla, New York, United States of America

Karen F McGregor

Affiliation Microbiology Research Group, Thames Valley University, London, United Kingdom

Debra E Bessen

Affiliation Department of Microbiology and Immunology, New York Medical College, Valhalla, New York, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JEW and DEB conceived and designed the experiments, contributed reagents/materials/analysis tools, and wrote the paper. KFM performed the experiments. JEW, KFM, and DEB analyzed the data. JEW wrote the software.