RIKEN Center for Life Science Technologies (CLST), Riken Yokohama Institute, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045 Kanagawa, Japan. lassmann@gsc.riken.jp.|RIKEN Center for Life Science Technologies (CLST), Riken Yokohama Institute, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045 Kanagawa, Japan. lassmann@gsc.riken.jp.|School of Computer Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, P,R, China. xuyun@ustc.edu.cn.|School of Computer Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, P,R, China. xuyun@ustc.edu.cn.