1. Physical Chemistry of BiosystemsInstitute of Physical ChemistryHeidelberg University D-69120 Heidelberg Germany
2. Current address: Institute of Industrial ScienceThe University of Tokyo 153–0041 Tokyo Japan
3. Center for Integrative Medicine and Physics, Institute for Advanced StudyKyoto University 606-8501 Kyoto Japan
4. Institut Charles Sadron (CNRS UPR 22)University of Strasbourg 23 rue du Loess F-67034 Strasbourg Cedex France
5. European Synchrotron Radiation Facility (ESRF) Grenoble Cedex 9 38053 France