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Immunohistochemical staining for RNase 7 in normal oral epithelium. Positive staining for RNase 7 was observed in the surface layers of hard palate (a), tongue (b), and attached gingiva (c). No immunoreaction was detected in the normal epithelium of buccal mucosa (d). Negative control showed negative staining (inset of a). Bars = 100 μm (a–d); 100 μm (insets of a).
