Department of Computer Science, Center for Bioinformatics (ZBIT), Tübingen University, Sand 14, 72076 Tübingen, Germany.|Department of Computer Science, Center for Bioinformatics (ZBIT), Tübingen University, Sand 14, 72076 Tübingen, Germany.|Department of Computer Science, Center for Bioinformatics (ZBIT), Tübingen University, Sand 14, 72076 Tübingen, Germany.|Department of Computer Science, Center for Bioinformatics (ZBIT), Tübingen University, Sand 14, 72076 Tübingen, Germany.