About the Authors

Chase L. Beisel

Affiliation Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, United States of America

Christina D. Smolke

christina.smolke@stanford.edu

Current address: Department of Bioengineering, Stanford University, Palo Alto, California, United States of America

Affiliation Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CLB CDS. Performed the experiments: CLB. Analyzed the data: CLB CDS. Wrote the paper: CLB CDS.