1. Department of Applied Chemistry, School of Natural and Applied Science, Northwestern Polytechnical University, 710072 Xi’an, P. R. China
2. Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education. School of Medicine, Northwest University, 229 Taibai North Road, Xi’an 710069, China
3. Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China