1. Biomaterials and Biocatalysts Group, Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore 117604
2. Raffles Institution, 1 Raffles Institution Lane, Singapore 575954
3. Korean Agricultural Culture Collection (KACC), Agricultural Microbiology Division, National Academy of Agricultural Science, Rural Development Administration (RDA), Suwon 441-707, Republic of Korea