Plots of the steady state solutions A
for various values of λ
(see equation (9a)). Other parameter values: λ2 = 50, μ
= 1. For small λ3 the centre of the tissue (x = 0) has the highest concentration of a; as λ3 increases, the maximum point moves towards the tissue's edge (x = 1), until for sufficiently large λ3, the concentration is monotonically decreasing away from the boundary.