1. ZIEL Research Center of Nutrition and Food Sciences; Abteilung Biochemie; Technische Universität München; Gregor-Mendel-Str. 2 D-85350 Freising Germany
2. Laboratory of General Physiology; Department of Biological and Environmental Sciences and Technologies; University of Salento; via Provinciale Lecce-Monteroni I-73100 Lecce Italy