About the Authors
Department of Molecular, Cell, and Developmental Biology, University of California Santa Cruz, Santa Cruz, California, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: SS KMD JWT. Performed the experiments: SS KMD. Analyzed the data: SS KMD JWT. Contributed reagents/materials/analysis tools: SS KMD JWT. Wrote the paper: SS KMD JWT.