1. School of Food and Biological Engineering, and Natural Food Macromolecule Research Center, Shaanxi University of Science and Technology, Xi’an 710021, P. R. China
2. Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P. R. China
3. Departments of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada