1. Institute
of Biomolecule Reconstruction, Sun Moon University, Asansi, Chungnam 336-708, Korea
2. Chemical
Genomics National Research Laboratory, Department of Biotechnology, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
3. Chemical
Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochangeup,
Cheongwongun, Chungcheongbukdo 363-883, Korea
4. Chemical Biology
Research Group, RIKEN Center
for Sustainable Resource Science, and Antibiotics Laboratory, 2-1 Hirosawa, Wako-shi 351-0198, Japan