1. State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University , Tianjin, China
2. Department of Biochemistry, University of Otago , Dunedin, New Zealand
3. Department of Microbiology and Immunology, University of Otago , Dunedin, New Zealand