1. Key Laboratory of Leather Chemistry and Engineering (Sichuan University), Ministry of Education and College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, PR China
2. Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & PeKing Union Medical College, Beijing 100050, PR China
3. Sichuan Industrial Institute of Antibiotics, Chengdu University, Chengdu 610052, PR China