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Figure 4
High magnification, light field photomicrographs of tissue sections through the olfactory epithelium (oe in A) and olfactory bulb (B) of a postnatal day 4 rat.  (A) NT3 immunoreactivity is detected in olfactory nerve axons (ax) located below and within the lamina propria (lp).  (B) TrkB antibody stains the mitral cells (m) of the olfactory bulb, with cell bodies more densely labeled than their dendrites which are distributed in the external plexiform layer (epl) and within individual glomeruli (g). No trkB immunostaining is detected in the olfactory nerve layer (onl). [gcl: granule cell layer]