About the Authors

Julius Brennecke

Contributed equally to this work with: Julius Brennecke, Alexander Stark

Affiliation European Molecular Biology Laboratory, Heidelberg, Germany

Alexander Stark

Contributed equally to this work with: Julius Brennecke, Alexander Stark

Affiliation European Molecular Biology Laboratory, Heidelberg, Germany

Robert B Russell

Affiliation European Molecular Biology Laboratory, Heidelberg, Germany

Stephen M Cohen

To whom correspondence should be addressed. E-mail: cohen@embl.de

Affiliation European Molecular Biology Laboratory, Heidelberg, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JB, AS, and SMC conceived and designed the experiments. JB and AS performed the experiments and analyzed the data. JB, AS, RBR, and SMC wrote the paper.