International NRW Graduate School in Bioinformatics and Genome Research, Center for Biotechnology (CeBITec), Bielefeld University, D-33594 Bielefeld, Germany. mbeckste@techfak.uni-bielefeld.de|International NRW Graduate School in Bioinformatics and Genome Research, Center for Biotechnology (CeBITec), Bielefeld University, D-33594 Bielefeld, Germany. mbeckste@techfak.uni-bielefeld.de|International NRW Graduate School in Bioinformatics and Genome Research, Center for Biotechnology (CeBITec), Bielefeld University, D-33594 Bielefeld, Germany. mbeckste@techfak.uni-bielefeld.de|International NRW Graduate School in Bioinformatics and Genome Research, Center for Biotechnology (CeBITec), Bielefeld University, D-33594 Bielefeld, Germany. mbeckste@techfak.uni-bielefeld.de