1. Departments of Agricultural, Food and Nutritional Science and
2. Physical Education and Sports Studies, University of Alberta, Edmonton, Alberta, T6G 2P5, Canada; and
3. Unité de Nutrition et Métabolisme Proteique and
4. Unité de Nutrition Cellulaire et Moléculaire, Institut National de la Recherche Agronomique, Theix, 63122 Ceyrat, France