Figure 2

The effect of the functional similarity on module identification. Subfigure (a) shows the protein protein interactions, new protein relations (marked as dash line) were added to (a) because they have higher functional similarity, then a new protein network was built as show in (b). Both modules (circled) will be easily found in (b). Note that the five genes in the left cycle form a module only after the addition of the functional relations between genes, so does the right module.