Center for Bioinformatics Tübingen (ZBIT), University of Tübingen, Sand 1, 72076 Tübingen, Germany. Jochen.Supper@uni-tuebingen.de|Center for Bioinformatics Tübingen (ZBIT), University of Tübingen, Sand 1, 72076 Tübingen, Germany. Jochen.Supper@uni-tuebingen.de|Center for Bioinformatics Tübingen (ZBIT), University of Tübingen, Sand 1, 72076 Tübingen, Germany. Jochen.Supper@uni-tuebingen.de|Center for Bioinformatics Tübingen (ZBIT), University of Tübingen, Sand 1, 72076 Tübingen, Germany. Jochen.Supper@uni-tuebingen.de|Center for Bioinformatics Tübingen (ZBIT), University of Tübingen, Sand 1, 72076 Tübingen, Germany. Jochen.Supper@uni-tuebingen.de