Kaimann, T. [P:(DE-HGF)0] ; Metzger, S. [P:(DE-HGF)0] ; Kuhlmann, K. [P:(DE-HGF)0] ; Brandt, B. [P:(DE-HGF)0] ; Birkmann, E. [P:(DE-Juel1)VDB65870] ; Höltje, H.-D. [P:(DE-HGF)0] ; Riesner, D. [P:(DE-HGF)0]