1. School of Life Sciences, Southwest University, Chongqing 400715, P.R. China
2. School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, P.R. China
3. Cancer Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
4. State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, P.R. China