Graduate School of Information Sciences, Tohoku University, Sendai, 980-8579, Japan. kyamada@ecei.tohoku.ac.jp.|Graduate School of Information Sciences, Tohoku University, Sendai, 980-8579, Japan.|Graduate School of Information Sciences, Tohoku University, Sendai, 980-8579, Japan.|Center for Proteomics and Bioinformatics, Case Western Reserve University, Cleveland, OH, 44106, USA. masaru.miyagi@case.edu.