1. Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, D-14424 Golm/Potsdam, Germany, Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Str. 24-25, Bldg. 25, 14476 Golm, Germany, National Institute for Materials Science, Tsukuba, Ibaraki 305-004 Japan, Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, and Wildau University of Applied Sciences, Biosystems Technology, Bahnhofstr. 1, 15745 Wildau, Germany