1. Deparment of Grain Science and Industry, Kansas State University, Manhattan, Kansas 66506, United States
2. Deparment of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
3. Agricultural Research Service, Center for Grain and Animal Health Research, USDA, 1515 College Ave, Manhattan, Kansas 66502, United States
4. Department of Food, Nutrition, Dietetics and Health, Kansas State University, Manhattan, Kansas 66506, United States