1. Research associate and assistant professor, Department of Food Science & Human Nutrition and IMPACT, Washington State University, Pullman, WA 99164-6376.
2. Professor, Division of Biosciences and Technology, Korea University, Seoul, Korea.
3. Corresponding author. Phone: (509) 335-8230. E-mail: bbaik@wsu.edu. Fax: (509) 335-4815.