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Complementary expression of Bsk and ligand(s) in the E18 olfactory system. A, Photomicrograph of a sagittal section of the olfactory bulb and nasal epithelium stained with Bsk-AP (areas indicated by arrows).B, Bsk receptor expression detected by in situ hybridization in a similar section as in A.AOB, Accessory olfactory bulb; MOB, main olfactory bulb; NE, nasal epithelium; ONolfactory nerve. Scale bar, 0.5 mm.
