1. Department of Chemistry, University of Connecticut, U-3060, 55 North Eagleville Road, Storrs, Connecticut 06269-3060, United States
2. Institute of Physical Biology, University of South Bohemia, Nove Hrady, Czech Republic
3. Dipartimento di Biotecnologie, Università di Verona, Strada Le Grazie 15, I-37134 Verona, Italy