About the Authors

Nathaniel L Clark

To whom correspondence should be addressed. E-mail: clarknl@u.washington.edu

Affiliation Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America

Willie J Swanson

Affiliation Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

NLC and WJS conceived and designed the experiments. NLC performed the experiments. NLC analyzed the data. NLC and WJS contributed reagents/materials/analysis tools. NLC wrote the paper.