1. Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche, Università degli Studi di Palermo, via Archirafi,18, I-90123 Palermo, Italy
2. Research Institute of Luminous Organisms, Hachijo, 2749 Nakanogo (Hachijojima), Tokyo 100-1623, Japan
3. Department of Genetics and Physiology, Oulu University, Oulu, FIN 90140, Finland