About the Authors

Long Ma

Affiliation Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America

H. Robert Horvitz

horvitz@mit.edu

Affiliation Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LM HRH. Performed the experiments: LM. Analyzed the data: LM HRH. Wrote the paper: LM HRH.