A category in the organism-specific DAG is regarded as important if it contains at least one GO-terms from
the vector supplied. The function does not visualise the entire organism's DAG, it accepts a range of GO-terms
and DAG categories that contains
these GO-terms are visualise. We refer to these categories as the important and everything else
is faded out. The supported organisms are "Homo sapiens / Human", "Rattus norvegicus / Rat",
"Mus musculus / Mouse", "Danio rerio / Zebrafish",
"Caenorhabditis elegans / Worm" ,"Arabidopsis thaliana / Cress", "Saccharomyces cerevisiae / Yeast",
"Schizosaccharomyces pombe / Fission yeast",
"Drosophila melanogaster / Fruit fly", "Escherichia coli / E.coli".