About the Authors

Ai Chen

chenainy@hotmail.com (A. Chen); chomyn@caltech.edu (A. Chomyn)

Current address: Department of Medicine, Division of Endocrinology and Metabolism, University of California San Diego, La Jolla, California, United States of America

Affiliation Division of Biology, California Institute of Technology, Pasadena, California, United States of America

Nicola Raule

Current address: Centro Universitario Sportivo Bologna, Bologna, Italy

Anne Chomyn

chenainy@hotmail.com (A. Chen); chomyn@caltech.edu (A. Chomyn)

Affiliation Division of Biology, California Institute of Technology, Pasadena, California, United States of America

Giuseppe Attardi

† Deceased.

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GA A. Chen A. Chomyn. Performed the experiments: A. Chen NR. Analyzed the data: A. Chen A. Chomyn NR. Wrote the paper: GA A. Chen A. Chomyn.