About the Authors
Center of Physiology and Pathophysiology, Institute of Neurophysiology, Cologne, Germany
Institute of Clinical Chemistry, University Medical Center, Hamburg-Eppendorf, Hamburg, Germany
Institut of Organic Chemistry, Mass Spectrometry Group, Universität Hamburg, Hamburg, Germany
Proteome Factory AG, Berlin, Germany
The authors have read the journal's policy and have the following conflicts: Karola Lehmann is employed by Proteome Factory AG. There are no other declarations relating to employment, consultancy, patents, products in development or marketed products. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials
Conceived and designed the experiments: AS KM SJ VW JH HS. Performed the experiments: KM SJ VW JH HS DH MT KL. Analyzed the data: AS KM SJ JW JAG. Contributed reagents/materials/analysis tools: AS KM SJ JW JAG. Wrote the paper: AS KM.