Fig. 6. Papillary innervation at E15 and E16. PGP 9.5 immunofluorescence (left column) and Nomarski image overlays (right column) showing the extent of papillary innervation. (A-D) E15 (A,B) fungiform and (C,D) circumvallate papillae. Nerve fibers have begun to penetrate into the papillary epithelium. (E-H) E16 (E,F) fungiform and (G,H) circumvallate papillae. The papillary epithelium is densely innervated by this time. Scale bars: 50 µm.
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