About the Authors

Michael M. Cox

cox@biochem.wisc.edu

Affiliation Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America

James L. Keck

Affiliation Department of Biomolecular Chemistry, University of Wisconsin-Madison, Madison, Wisconsin, United States of America

John R. Battista

Affiliation Department of Biological Sciences, Louisiana State University and A & M College, Baton Rouge, Louisiana, United States of America

Competing Interests

The authors have declared that no competing interests exist.