FIGURE 2 .

(a) One-parameter bifurcation diagram showing stable (solid lines) and unstable (dashed lines) fixed points of the mean-field equation Eq. 4 as function of unloaded receptor-ligand distance λ = ℓ/ℓ_b and for three values of inverse ligand mobility, β = k_bℓ_b²/k_bT = 0.5, 1, and 2. The other parameters are N_t = 10, k_on/k₀ = 1, k_b/k_t = 1, and k_bℓ_b/F₀ = 0.1. (b) Stability diagram constructed from the location λ of upper and lower bifurcation points shown in a as function of β.