1. Laboratory of Plant Genomics, Korea Research Institute of Bioscience and Biotechnology, Yusong-gu, Taejon 305-333, Korea
2. Department of Biology, Chungnam National University, Taejon 305-764, Korea
3. Laboratory of Cell Biology, Korea Research Institute of Bioscience and Biotechnology, Yusong-gu, Taejon 305-333, Korea
4. Division of Molecular and Life Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea
5. Division of Biosciences and Bioinformatics, Myongji University, Nam-dong, Yongin, Kyonggi-do 449-728, Korea