About the Authors

Wen-Yu Chung

Affiliation Center for Comparative Genomics and Bioinformatics, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Samir Wadhawan

Affiliation Center for Comparative Genomics and Bioinformatics, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Radek Szklarczyk

Affiliation Integrative Bioinformatics Institute, Vrije Universiteit, Amsterdam, The Netherlands

Sergei Kosakovsky Pond

To whom correspondence should be addressed. E-mail: spond@ucsd.edu (SKP); anton@bx.psu.edu (AN)

Affiliation Antiviral Research Center, University of California San Diego, La Jolla, California, United States of America

Anton Nekrutenko

To whom correspondence should be addressed. E-mail: spond@ucsd.edu (SKP); anton@bx.psu.edu (AN)

Affiliation Center for Comparative Genomics and Bioinformatics, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

AN conceived and designed the experiments. WYC performed the experiments. All authors analyzed the data. SW, RS, and SKP contributed reagents/materials/analysis tools. WYC and AN wrote the paper.