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. Author manuscript; available in PMC: 2011 Oct 1.
Published in final edited form as: Eur Phys J E Soft Matter. 2010 Sep 23;33(2):129–148. doi: 10.1140/epje/i2010-10647-6

Figure 6.

Figure 6

(A) The response of a's bifurcation diagram to increasing amounts of externally generated u (i.e. uns). The value of the activating input ḡ(h) at which the low (stable) and middle (unstable) steady states collide increases with increasing uns until this bifurcation eventually becomes inaccessible for any finite h. (B) The dynamics of a with no external inhibition and various fixed activations. Because of autoinhibition, ∂ta is insensitive to h for a above a certain threshold, and there is thus well-defined minimum amount of time, independent of h, between a cell's activation and its reaching the high a state. Parameters: Aa = 0.25; Au = 0.75; U = 0.0001; G = 1; mu = 8; na = 4; nu = 8.