1. Institut für Physikalische und Theoretische Chemie and Institut für Biochemie, J. W. Goethe Universität Frankfurt, D-60439 Frankfurt am Main, Germany, Max-Planck Institut für Biophysik, D-60528 Frankfurt am Main, Germany, Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, ATP System Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Corporation (JST), Nagatsuta, Midori-ku, Yokohama 226-0026,...