1. Institute of Physiology II, University Hospital Jena, Friedrich-Schiller-University Jena, D-07740 Jena, Germany.
2. Center of Advanced European Studies and Research, Molecular Sensory Systems, Ludwig-Erhard-Allee 2, D-53175 Bonn, Germany.
3. Biomolecular Photonics Group, University Hospital Jena, Friedrich-Schiller-University Jena, D-07740 Jena, Germany.
4. BIOLOG Life Science Institute, Flughafendamm 9A, D-28199 Bremen, Germany.