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High power lightfield photomicrographs of nAChR subunit mRNA expression in small intestines. (A) α2, (B) α3, (C) α5, (D) α7, (E) β2 (E) and (F) β4 hybridization signal. Black arrowheads point to expression in the myenteric plexus. Large black arrows point to expression in the submucosal plexus, small black arrows point to α2 mRNA expression near the lumen. Lu, lumen. Size bar: 50 μm.
