1. Department of Applied Chemistry Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan
2. Faculty of Environmental Earth Science Hokkaido University North 10 West 5, Kita-ku Sapporo Hokkaido 060-0810 Japan
3. Institute of Biotechnology RWTH Aachen University Worringerweg 3 Aachen 52074 Germany