Fig. 4. The mapping of the nasotemporal axis of mouse retina onto the rostrocaudal axis of the colliculus. (A-F) The six experimental cases investigated by Reber and co-workers (Reber et al., 2004). Green-filled inverted triangles are projection points from EphA3⁺ cells; black-filled triangles are points from EphA3^- cells. Cubic fits to the data are shown. Data values kindly provided by Greg Lemke. (G-L) The plots obtained from computer simulations of the retinal induction model, assuming EphA distributions in the retina as given in Fig. 2; other parameter values are given in the legend to Table 1.