About the Authors

Matthew T. Cabeen

cabeen@fas.harvard.edu.

Affiliation Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts, United States of America

Competing Interests

This work was funded by the BASF (www.basf.com) Advanced Research Initiative at Harvard University, Grant 5366005-01. This does not alter the author's adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MTC. Performed the experiments: MTC. Analyzed the data: MTC. Contributed reagents/materials/analysis tools: MTC. Wrote the paper: MTC.