1. Department of Physiology, Institute of Nutrition and Food Technology, University of Granada, C/ Ramón y Cajal 4, 18071 Granada, Spain. e-mail: jlquiles@ugr.es
2. Institute of Biochemistry, Faculty of Medicine, Università Politecnica delle Marche, Ancona, Italy
3. Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology, University of Granada, Granada, Spain