About the Authors

Tamar Geiger

Affiliation Department for Proteomics and Signal Transduction, Max-Planck Institute for Biochemistry, Martinsried, Germany

Juergen Cox

Affiliation Department for Proteomics and Signal Transduction, Max-Planck Institute for Biochemistry, Martinsried, Germany

Matthias Mann

mmann@biochem.mpg.de

Affiliation Department for Proteomics and Signal Transduction, Max-Planck Institute for Biochemistry, Martinsried, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TG. Performed the experiments: TG. Analyzed the data: TG JC. Contributed reagents/materials/analysis tools: JC. Wrote the paper: TG MM.