1. Department of Food Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
2. Corresponding author. Phone: (204) 474-8214. Fax: (204) 474-7630.
3. Grain Research Laboratory, Canadian Grain Commission, Winnipeg, MB R3C 3G8, Canada. E-mail: Trust_Beta@UManitoba.CA