About the Authors
Center for Computational Biology and Bioinformatics, Section of Integrative Biology, University of Texas at Austin, Austin, Texas, United States of America
Institute for Cell and Molecular Biology, University of Texas at Austin, Austin, Texas, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: TZ COW. Performed the experiments: TZ. Analyzed the data: TZ PJE COW. Contributed reagents/materials/analysis tools: TZ PJE. Wrote the paper: TZ PJE COW.