Olfactory bulbectomy fails to recruit additional secretagogin+ cells in the RNA. (A) Bulbectomy increases the number of BrdU+ cells in the distal limb of the RMS (see Fig. 4 F and F′ for sampling). (B–D) Secretagogin+ neurons remain BrdU− following bulbectomy. (E–G) Secretagogin+ neurons do not express DCX in the RMS, irrespective of bulbectomy. (H–I′′′′) Removal of the olfactory bulb induces secretagogin expression in many NeuN+/S100β− neurons. (Scale bars: 30 µm in B, C, E, H, and J; 20 µm in F; 10 µm in E1′′, F1′′, H′′′′, and I′′′′.)