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Fluorescence micrographs of longitudinal sections through the trachea of (A) WT and (B) P2X-dblKO mice showing similar dense epithelial innervation (arrowheads) of the oral face of the arytinoids as revealed by PGP-immunoreactivity (red). In panel A, a taste bud (tb) is identifiable by the presence of a taste cell labeled by TrpM5-driven GFP. Panel A: Nomarski image. B: Counterstained with Neurotrace Green which is pseudocolored blue.
