1. Biomolecular
Mass Spectrometry and Proteomics Group, Bijvoet Center for Biomolecular
Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
2. Netherlands Proteomics Center, Padualaan
8, 3584 CH Utrecht, The Netherlands
3. Departments
of Chemistry and Biochemistry, University of Oxford, New Biochemistry Building, South Parks Road, Oxford, OX1 3QU Oxfordshire, United Kingdom