About the Authors

Matthew B. Lohse

Affiliation Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, California, United States of America

Alexander D. Johnson

To whom correspondence should be addressed. E-mail: ajohnson@cgl.ucsf.edu

Affiliations Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, California, United States of America, Department of Microbiology and Immunology, University of California at San Francisco, San Francisco, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AJ ML. Performed the experiments: ML. Analyzed the data: ML. Wrote the paper: AJ ML.