About the Authors

Kazuo Tori

Affiliation New England Biolabs, Inc., Ipswich, Massachusetts, United States of America

Francine B. Perler

perler@neb.com

Affiliation New England Biolabs, Inc., Ipswich, Massachusetts, United States of America

Competing Interests

The authors were employed by New England Biolabs while performing this research. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials. This work relates solely to basic biology and has no commercial interest or patent value.

Author Contributions

Conceived and designed the experiments: KT FBP. Performed the experiments: KT. Analyzed the data: KT FBP. Wrote the paper: KT FBP.