1. National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun 130012, Jilin Province, China
2. Norman Bethune Health Science Center, Jilin University, Changchun 130021, Jilin Province, China
3. Key Laboratory for Molecular Enzymology and Engineering, The Ministry of Education, School of Life Sciences, Jilin University, Changchun 130012, Jilin Province, China