1. Magnetic Resonance Center (CERM), University of Florence, and Consorzio Interuniversitario Risonanze Magnetiche di Metalloproteine (CIRMMP), via Sacconi 6, Sesto Fiorentino 50019, Italy
2. Department of Life Sciences and Coimbra Chemistry Center, University of Coimbra, Coimbra 3004-531, Portugal
3. UCIBIO-Requimte, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, Caparica 2829-516, Portugal
4. Department of Chemistry, University of Florence, Sesto Fiorentino 50019, Italy
5. Department of Earth Sciences, University of Florence, Sesto Fiorentino 50019, Italy