1. Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo
2. Tokyo 113-8656
3. Japan
4. iPS Cell Advanced Characterization and Development Team, RIKEN BioResource Research Center
5. Ibaraki 305-0074
6. Laboratory of Gene Regulation, Faculty of Medicine, University of Tsukuba
7. Ibaraki 305-8575
8. Department of Bioengineering, Graduate School of Engineering, The University of Tokyo