The overexpression summary map shows nine spots which are strongly overexpressed in different tissues. (part a) Overrepresentation of a collection of 1454 gene sets is estimated for each spot using the hypergeometrical distribution. The right legend assigns the two most significantly overrepresented gene sets to the respective spots. The top-twenty gene sets of the ranked list are shown in part b for three selected spots. The length of the bars scales with the logged overrepresentation p-value of the sets. The color assigns the category of the gene sets according to the GO terms 'molecular process' (green), 'molecular component' (red) and 'molecular process' (blue).