1 Department of Biological Sciences, Research Center for Functional Cellulomics, Seoul National University, Seoul, 151-742, South Korea.
2 School of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, South Korea.
3 Department of Biological Sciences, Sookmyung Women's University, Seoul, 140-742, South Korea.
4 Department of Biological Sciences, Research Center for Functional Cellulomics, Seoul National University, Seoul, 151-742, South Korea. sbaek@snu.ac.kr.