1. Department of Biochemistry, Faculty of Dentistry, Chulalongkorn University, Henri-Dunant Road, Patumwan, Bangkok 10300, Thailand, Department of Biochemistry and Center for Excellence in Protein Structure and Function, Faculty of Science, Mahidol University, Bangkok 10400, Thailand, and Department of Food Science and Technology, BOKU-University of Natural Sources and Applied Life Sciences, Vienna A-1190, Austria