[1] Katholieke Univ Leuven, Lab Photochem & Spect, Dept Chem, B-3001 Louvain, Belgium
[2] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
[3] Katholieke Univ Leuven, Dept Chem, Lab Biomol Dynam, B-3001 Louvain, Belgium
[4] Forschungszentrum Julich, Inst Biol Informatverarbeitung 1, D-52425 Julich, Germany