About the Authors

Patric Jern, John M Coffin
Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, Massachusetts, United States of America

Jonathan P Stoye
Division of Virology, MRC National Institute for Medical Research, London, United Kingdom

Corresponding Author

John.Coffin@tufts.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

PJ, JPS, and JMC conceived the study. JPS retrieved initial sequences and PJ performed bioinformatics analyses. PJ, JPS, and JMC analyzed the results and wrote the paper.