About the Authors

Peter C. St. John

Affiliations Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California, United States of America, Biosciences Center, National Renewable Energy Laboratory, Golden, Colorado, United States of America

Francis J. Doyle III

frank_doyle@seas.harvard.edu

Affiliations Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California, United States of America, Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PCSJ FJD. Performed the experiments: PCSJ. Analyzed the data: PCSJ. Wrote the paper: PCSJ FJD.