1. Department of Biomedical Sciences, University of Modena and Reggio Emilia, Modena, Italy.
2. Department of Chemistry, University of Basilicata, Potenza, Italy.
3. Opocrin, Corlo (Modena), Italy.
4. Institut de Biologie et Chimie des Protéines, CNRS– Université Lyon 1, Lyon, France.