Figure 6.

Main subsystems for the segment polarity network model. Diagrams representing the 5 main subsystems for the model (S_A, S_B1, S_B2, S_C1, S_C2). Each diagram shows the nodes, states (white = 1, black = 0) and cells involved in the subsystem. Interactions between the nodes are also shown (red arrow = activation, blue dot = inhibition, dashed line = indirect interaction). All subsystems are fixed states. There are 14 other minor subsystems for this model (S_D1 - S_J2), which are shown in Table 5.