Clustering results from the B. subtilis sub-network that responds to glucose. The image shows the modular structures obtained using the clustering method. The figure is composed of a giant component with six modules (M1-6) and two mini-modules (MM1-2). Disconnected from the giant component, we have 16 mini-modules (MM3-18) and two modules (M8-9). The column on the right hand side shows the transcriptional response for each gene, according to the microarray data. Red color represents an increase in transcript level, green color represents a decrease in transcript level and grey color indicates no significant change in transcript level.