Bioinformatics Centre, Institute of Molecular Biology, University of Copenhagen Universitetsparken 15, 2100 Copenhagen Ø, Denmark. stinus@binf.ku.dk|Bioinformatics Centre, Institute of Molecular Biology, University of Copenhagen Universitetsparken 15, 2100 Copenhagen Ø, Denmark. stinus@binf.ku.dk|Bioinformatics Centre, Institute of Molecular Biology, University of Copenhagen Universitetsparken 15, 2100 Copenhagen Ø, Denmark. stinus@binf.ku.dk