EphrinA5 protein expression in newborn mouse brain. EphrinA5 protein distribution is represented on coronal sections in a rostro-caudal sequence (panels a to k) and on sagittal sections in a medio-lateral sequence (panels l to q). EphrinA5 protein expression dramatically decreased in all brain regions compared to previous stages. The strongest expression was observed in the septum (panel o) the hypothalamus (panel p) and in the commissure of superior colliculus (panel k). Arrowheads in panels e and m indicate respectively a discrete lateral and ventral (high) to medial and dorsal (low) gradient in the striatum and a caudal (high) to rostral (low) gradient in the inferior colliculus. Scale bar: panel a: 250 μm; panels b, m, p, q: 200 μm; panels c, e, f, g, h, n: 300 μm; panels d, k: 150 μm; panels i, l: 500 μm; panel j: 400 μm; panel o: 350 μm. Abbreviations: see list.