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Immunostaining of adrenals of TH-null mice and WT animals at P15. Both the chromaffin cells in TH-null and WT animals stain intensely with anti-PGP 9.5, a neurospecific protein (A and B). The intensity of the immunohistofluorescence for the neuropeptides M-Enk and NPY is enhanced in TH-null mice (D and F) compared with WT animals (C and E).
