Dpt. of Bioinformatics & Biochemistry, University of Braunschweig, Institute of Technology, Langer Kamp 19B, 38106 Braunschweig, Germany.|Dpt. of Bioinformatics & Biochemistry, University of Braunschweig, Institute of Technology, Langer Kamp 19B, 38106 Braunschweig, Germany.|Dpt. of Bioinformatics & Biochemistry, University of Braunschweig, Institute of Technology, Langer Kamp 19B, 38106 Braunschweig, Germany.