Graduate Program in Bioinformatics, Seoul National University, Seoul, Korea. skkim@bi.snu.ac.kr|Graduate Program in Bioinformatics, Seoul National University, Seoul, Korea. skkim@bi.snu.ac.kr|Graduate Program in Bioinformatics, Seoul National University, Seoul, Korea. skkim@bi.snu.ac.kr|Graduate Program in Bioinformatics, Seoul National University, Seoul, Korea. skkim@bi.snu.ac.kr|Graduate Program in Bioinformatics, Seoul National University, Seoul, Korea. skkim@bi.snu.ac.kr