Macromolecular Modeling Group, Institute of Chemistry and Biochemistry, FU Berlin, Takustrasse 6, 14195 Berlin, Germany. bjko@chemie.fu-berlin.de <bjko@chemie.fu-berlin.de>|Macromolecular Modeling Group, Institute of Chemistry and Biochemistry, FU Berlin, Takustrasse 6, 14195 Berlin, Germany. bjko@chemie.fu-berlin.de <bjko@chemie.fu-berlin.de>|Macromolecular Modeling Group, Institute of Chemistry and Biochemistry, FU Berlin, Takustrasse 6, 14195 Berlin, Germany. bjko@chemie.fu-berlin.de <bjko@chemie.fu-berlin.de>|Macromolecular Modeling Group, Institute of Chemistry and Biochemistry, FU Berlin, Takustrasse 6, 14195 Berlin, Germany. bjko@chemie.fu-berlin.de <bjko@chemie.fu-berlin.de>|Macromolecular Modeling Group, Institute of Chemistry and Biochemistry, FU Berlin, Takustrasse 6, 14195 Berlin, Germany. bjko@chemie.fu-berlin.de <bjko@chemie.fu-berlin.de>