About the Authors

Lei Kai

Affiliations Centre for Biomolecular Magnetic Resonance, Institute for Biophysical Chemistry, Goethe-University of Frankfurt/Main, Frankfurt/Main, Germany, Institute of Botany, Applied Plant Science, Darmstadt University of Technology, Darmstadt, Germany

Volker Dötsch

Affiliation Centre for Biomolecular Magnetic Resonance, Institute for Biophysical Chemistry, Goethe-University of Frankfurt/Main, Frankfurt/Main, Germany

Ralf Kaldenhoff

Affiliation Institute of Botany, Applied Plant Science, Darmstadt University of Technology, Darmstadt, Germany

Frank Bernhard

fbern@bpc.uni-frankfurt.de

Affiliation Centre for Biomolecular Magnetic Resonance, Institute for Biophysical Chemistry, Goethe-University of Frankfurt/Main, Frankfurt/Main, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LK RK VD FB. Performed the experiments: LK. Analyzed the data: LK RK FB. Contributed reagents/materials/analysis tools: RK VD. Wrote the paper: LK FB.