BMP7 expression in the olfactory bulb (A, B), medial septal nucleus (C), diagonal band (D, E), lateral septal nucleus (F, G), and islands of Calleja (H). Astrocyte-like cells were strongly stained in the external plexiform layer (arrowheads in B) and the lateral septal nucleus (arrowheads in F), and the ependyma of the lateral ventricle (arrows in F and G) was very strongly stained. DB, diagonal band; EPI, external plexiform layer; Gl, glomerular layer; ICj, islands of Calleja; LS, lateral septal nucleus; MS, medial septal nucleus; ON, olfactory nerve layer. Scale bar = 160 μm for C; 80 μm for A, D, F; 40 μm for B, E, G, H.