1. Department of Material and Life Science Division of Advanced Science and Biotechnology Graduate School of Engineering Osaka University 2‐1 Yamadaoka 565‐0871 Suita Osaka Japan
2. Picobiology Institute Graduate School of Life Science University of Hyogo Koto 1‐1‐1 679‐5148 Sayo‐cho Sayo‐gun, Hyogo Japan