1. College of Food Science and Nutritional EngineeringKey Laboratory of Safety Assessment of Genetically Modified OrganismChina Agricultural University 17 Tsinghua East Road, Haidian District Beijing 100083 China
2. School of Engineering and TechnologyChina University of Geosciences (Beijing) 29 Xueyuan Road, Haidian District Beijing 100083 China
3. Department of ChemistryTsinghua University 30 Shuangqing Road, Haidian District Beijing 100084 China