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Retrograde labeling from the olfactory bulb using DiI showed numerous mature olfactory sensory neurons throughout the rosette of control animals (A). There was little or no DiI labeling in the rosettes of animals examined 1 day after Triton X-100 treatment (B), but there were numerous DiI-labeled cells 5 days after detergent application (C). r = central raphe. Scale bar = 50 μm for all.
