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Trigeminal ganglion neurons following injection of the neural tracer CTB-488 into the tongue, were scattered throughout the mandibular division of the trigeminal ganglion (a). We found one double-labeled neuron (b, c, d) as well as neurons that were Phox2b-tdTomato-positive or Alexa-488-positive only (e, f, g). Images are the projected z-stack of 20 μm section. The scale bar in (a) =20 μm, the scale bar in (g) =10 μm and applies to (b–g)
