1. Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, Maryland 20742, United States
2. Agricultural Research Service, Beltsville Agricultural Research Center, Food Quality Laboratory, U.S. Department of Agriculture, Beltsville, Maryland 20705, United States
3. Department of Chemistry and Biochemistry, College of Computer, Mathematical and Natural Science, University of Maryland, College Park, Maryland 20742, United States
4. Agricultural Research Service, Soybean Genomics and Improvement Laboratory, Electron and Confocal Microscopy Unit, U.S. Department of Agriculture, Beltsville, Maryland 20705, United States