1. Plant Products and Human Nutrition Group, Division of Biochemistry and Molecular Biology, IBLS, University of Glasgow, Glasgow, G12 8QQ, U.K., Department of Human Nutrition, Glasgow Royal Infirmary, Queen Elizabeth Building, Glasgow, G31 2ER, U.K., Department of Biosciences, Teikyo University, Utsunomiya 320-8551, Japan, and Metabolic Biology Group, Department of Biology, Faculty of Science, Ochanomizu University, Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan