1. Magnetic Resonance Center (CERM)University of Florence and Consorzio Interuniversitario Risonanze Magnetiche di, Metallo Proteine (CIRMMP) Via L. Sacconi 6 50019 Sesto Fiorentino Italy
2. Department of ChemistryUniversity of Florence Via della Lastruccia 3 50019 Sesto Fiorentino Italy