1. Graduate School of Life Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan
2. Center for Materials Research by Information Integration, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
3. DYNAMO Team, DYNAMOP Group, Institut de Biologie Structurale—Jean-Pierre Ebel (CEA/CNRS/UJF UMR5075), 38027 Grenoble Cedex 1, France