Figure 2From: A mechanism for the sharp transition of morphogen gradient interpretation in XenopusA plot of the area in the parameter plane (k a , k b ) that allows the system to bifurcate. Bistability requires the balanced rates of synthesis of A and B (ka and kb). The product of cooperativity of the mutual repression between A and B must be greater than 1 (i.e. αβ > 1) for the system to bifurcate. μ = 3, kda = kdb = 1.Back to article page