About the Authors

Johannes H Urban

Affiliation Max Planck Institute for Infection Biology, RNA Biology Group, Berlin, Germany

Jörg Vogel

To whom correspondence should be addressed. E-mail: vogel@mpiib-berlin.mpg.de

Affiliation Max Planck Institute for Infection Biology, RNA Biology Group, Berlin, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JHU and JV conceived and designed the experiments. JU performed the experiments. JHU and JV analyzed the data. JV wrote the paper.