1. Magnetic Resonance Center (CERM) University of Florence Via Luigi Sacconi 6 50019 Sesto Fiorentino Italy
2. Laboratory of Bioinorganic Chemistry Department of Pharmacy and Biotechnology University of Bologna Viale Giuseppe Fanin 40, I 40127 Bologna Italy
3. Consorzio Interuniversitario di Risonanze Magnetiche di Metallo Proteine Via Luigi Sacconi 6 50019 Sesto Fiorentino Italy
4. Department of Chemistry University of Florence Via della Lastruccia 3 50019 Sesto Fiorentino Italy