1. Giotto Biotech, S.R.L Via Madonna del piano 6 50019 Sesto Fiorentino (FI) Italy
2. Department of Chemistry “Ugo Schiff”University of Florence Via della Lastruccia 3 50019 Sesto Fiorentino (FI), Italy
3. Biomolecular NMR, Department ChemieTechnical University of Munich Lichtenbergstrasse 4 85747 Garching Germany
4. Institute of Structural BiologyHelmholtz Center Munich Neuherberg Germany
5. Magnetic Resonance Center (CERM)University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (C.I.R.M.M.P) Via L. Sacconi 6 50019 Sesto FIorentino (FI) Italy