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Distribution of transient receptor potential cation channel A1(TRPA1) mRNA in human (A), mouse (B), and rat (C) tissues, and localization in rat small intestine (D). Data represent the ratio of TRPA1 to glyceraldehyde-3-phosphate dehydrogenase (G3PDH) or β-actin mRNA. Smooth muscle, smooth muscle layer; mucosa, mucosal layer; epithelial cell, isolated epithelial cell fraction; EC cell, enriched EC cell fraction. Data represent the mean ± S.D. (n = 3).
