Department of Biochemistry and Biophysics, Stockholm Bioinformatics Center, Science for Life Laboratory, Stockholm University, Stockholm, Sweden.|Department of Physics, Chemistry and Biology/Bioinformatics, Linköping University, Linköping, Sweden.|Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan.|Department of Biochemistry and Biophysics, Stockholm Bioinformatics Center, Science for Life Laboratory, Stockholm University, Stockholm, Sweden.