Figure 6. Two disjoint but intertwined communties mapped to the PDZ tertiary structure.

Shown here is a closeup of the red and purple clusters from Figure 5. These two communities are disjoint at this cutoff (90%) and on opposite sides of the pictured helix. Also of note is that they have a periodicity of three in sequence, not four residues as would be the case with residues interacting through the turns of an -helix.