About the Authors

Philipp J. Keller

Affiliation European Molecular Biology Laboratory (EMBL), Cell Biology and Biophysics Unit, Heidelberg, Germany

Michael Knop

knop@embl.de

Affiliation European Molecular Biology Laboratory (EMBL), Cell Biology and Biophysics Unit, Heidelberg, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PJK MK. Performed the experiments: PJK MK. Analyzed the data: PJK MK. Contributed reagents/materials/analysis tools: PJK. Wrote the paper: PJK MK.