1. Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, University of Utrecht, Utrecht, 3584 CH, The Netherlands
2. Netherlands Proteomics Center, Utrecht, 3584 CH, The Netherlands
3. Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, University of Utrecht, Utrecht, 3584 CG, The Netherlands
4. Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602, United States
5. Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States