1. School of Microbiology; Biosciences Institute; University College Cork; Cork Ireland
2. Division of Molecular Microbiology; College of Life Sciences; University of Dundee; Dundee UK
3. Institute of Biochemistry and Department of Agricultural Biotechnology; Seoul National University; Seoul 151-921 South Korea
4. National Chung Hsing University Biotechnology Center; National Chung Hsing University; Taichung 40227 Taiwan
5. State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources; The Key Laboratory of Ministry of Education for Microbial and Plant Genetic Engineering; College of Life Science and Technology; Guangxi University; 100 Daxue Road Nanning Guangxi 530004 China