Analyses of the core motif with asymmetrical parameters. a and b. One-parameter bifurcation diagram for steady state levels of X and Y as functions of primary signal S1 (S2 = S3 = 0). c. Bidirectional two-parameter bifurcation diagram with respect to primary signal S1 and polarizing signal S2 or S3. See legend of Figure 3 panels D and E for the interpretation of curves and colored circles. d-f. See legend of Figure 3 Panels G-I for simulation conditions.