Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering and College of Life Sciences, Peking University, Beijing 100871, PR China.|Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering and College of Life Sciences, Peking University, Beijing 100871, PR China.|Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering and College of Life Sciences, Peking University, Beijing 100871, PR China.|Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering and College of Life Sciences, Peking University, Beijing 100871, PR China.|Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering and College of Life Sciences, Peking University, Beijing 100871, PR China.|Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering and College of Life Sciences, Peking University, Beijing 100871, PR China.|Center for Bioinformatics, National Laboratory of Protein Engineering and Plant Genetic Engineering and College of Life Sciences, Peking University, Beijing 100871, PR China.