1. State Key Laboratory of Silkworm Genome Biology, Biological Science Research Center, Southwest University, Chongqing 400715, China
2. Chongqing Key Laboratory of Sericultural Science, Chongqing engineering and technology research center for novel silk materials, Southwest University, Chongqing 400715, China
3. Medical Research Institute, Wuhan University, Wuhan 430071, China
4. Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
5. School of Life Science, Southwest University, Chongqing 400715, China