Bioinformatics Center, Institute for Chemical Research, Kyoto University, Kyoto, Japan 611-0011. alexg@kuicr.kyoto-u.ac.jp|Bioinformatics Center, Institute for Chemical Research, Kyoto University, Kyoto, Japan 611-0011. alexg@kuicr.kyoto-u.ac.jp|Bioinformatics Center, Institute for Chemical Research, Kyoto University, Kyoto, Japan 611-0011. alexg@kuicr.kyoto-u.ac.jp