1. Department of Biomedical and Biotechnological Sciences, Microbiology section, University of Catania, Catania, Italy
2. Nacture S.r.l, Spin-off University of Catania, Catania, Italy
3. Department of Biomedical and Biotechnological Sciences, Biochemistry section, University of Catania, Catania, Italy
4. Institute of Crystallography, National Research Council (CNR), Catania, Italy