About the Authors
Department of Biology, Center for Genomics and Systems Biology, New York University, New York, New York, United States of America
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: SLS MLS. Performed the experiments: SLS WRM. Analyzed the data: SLS MLS. Wrote the paper: SLS MLS.