Hierarchical clustering of all yeast proteins using distance based on the MFscore. The color bar below the dendogram uses the same color scheme as Figure 6A to indicate the molecular function annotation of the proteins. The dendogram closely resembles the MDS of the yeast proteins. Five clusters can be seen in the dendogram: "catalytic activity" in red, "binding" in pink, "transcription regulator activity" in light green, "structural molecule activity" in orange, and "transporter activity" in dark blue. The dendogram was produced with the JavaTreeView software http://jtreeview.sourceforge.net/.