1. iB2, Biology Department, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
2. LAQV-REQUIMTE, Faculty of Sciences, University of Porto, 4050-453 Porto, Portugal
3. Proteomics and Protein Chemistry Unit, Department of Medicine and Life Sciences, Pompeu Fabra University, 08002 Barcelona, Spain
4. Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia