About the Authors

Jessica C. Seeliger

Affiliation Department of Pharmacological Sciences, Stony Brook University, Stony Brook, New York, United States of America

Shana Topp

Affiliation Departments of Chemistry, University of California, Berkeley, California, United States of America

Kimberly M. Sogi

Affiliation Departments of Chemistry, University of California, Berkeley, California, United States of America

Mary L. Previti

Affiliation Department of Pharmacological Sciences, Stony Brook University, Stony Brook, New York, United States of America

Justin P. Gallivan

Affiliation Department of Chemistry and the Center for Fundamental and Applied Molecular Evolution, Emory University, Atlanta, Georgia, United States of America

Carolyn R. Bertozzi

crb@berkeley.edu

Affiliations Departments of Chemistry, University of California, Berkeley, California, United States of America, Molecular and Cell Biology, University of California, Berkeley, California, United States of America, Howard Hughes Medical Institute, University of California, Berkeley, California, United States of America

Competing Interests

The authors have read the journal's policy and have the following conflicts: the University of California has filed a patent application based on this work. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials..

Author Contributions

Conceived and designed the experiments: JCS ST. Performed the experiments: JCS KMS MLP. Analyzed the data: JCS KMS MLP. Contributed reagents/materials/analysis tools: JCS ST KMS MLP. Wrote the paper: JCS ST KMS JPG CRB.