1. Frontier Core-Technology Laboratories, R & D Management Headquarters, FUJIFILM Corporation, 577, Ushijima, Kaisei-machi, Ashigarakami-gun, Kanagawa 258-8577, Japan
2. Department of Biochemistry, Keio University School of Medicine, Tokyo 160-8582, Japan
3. JST, ERATO, Suematsu Gas Biology Project, Tokyo 160-8582, Japan