Bioinformatics Research Center (BiRC), University of Aarhus, Høegh-Guldbergs Grade 10, Bldg. 090, DK-8000 Arhus C, Denmark. mailund@birc.dk|Bioinformatics Research Center (BiRC), University of Aarhus, Høegh-Guldbergs Grade 10, Bldg. 090, DK-8000 Arhus C, Denmark. mailund@birc.dk