About the Authors

Changrui Lu

Contributed equally to this work with: Changrui Lu, Fang Ding

Affiliation Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America

Fang Ding

Contributed equally to this work with: Changrui Lu, Fang Ding

Affiliation Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America

Ailong Ke

ailong.ke@cornell.edu

Affiliation Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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