About the Authors

Jia Liu

Affiliation The Departments of Chemistry and Cell and Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California, United States of America

Thomas Gaj

Affiliation The Departments of Chemistry and Cell and Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California, United States of America

James T. Patterson

Affiliation The Departments of Chemistry and Cell and Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California, United States of America

Shannon J. Sirk

Affiliation The Departments of Chemistry and Cell and Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California, United States of America

Carlos F. Barbas III

carlos@scripps.edu

Affiliation The Departments of Chemistry and Cell and Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JL TG CFB. Performed the experiments: JL TG JP SJS. Analyzed the data: JL TG CFB. Wrote the paper: JL TG CFB.