1. Department of Biochemistry University of Minnesota, St. Paul, Minnesota 55108, and The Procter & Gamble Company, Miami Valley Laboratories, Cincinnati, Ohio 45247
2. Department of Food Science University of Minnesota, St. Paul, Minnesota 55108, and The Procter & Gamble Company, Miami Valley Laboratories, Cincinnati, Ohio 45247
3. Department of Nutrition, University of Minnesota, St. Paul, Minnesota 55108, and The Procter & Gamble Company, Miami Valley Laboratories, Cincinnati, Ohio 45247