About the Authors
Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Heidelberg, Germany
Molecular Medicine Partnership Unit (MMPU), European Molecular Biology Laboratory, Heidelberg, Germany
Institute of Human Genetics, University of Heidelberg, Heidelberg, Germany
The authors have declared that no competing interests exist.
Conceived and designed the experiments: PB RP HR. Performed the experiments: PB CS. Analyzed the data: PB CS. Wrote the paper: PB HR RP.