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(A) Immunoblots, (B) Densitometry. (A) In both, Peyer's patch (PP) and neighboring villous epithelium (VE), claudin-1, claudin-2, claudin-3, claudin-4, claudin-5, and claudin-8, were detected. (B) Densitometric analysis of tight junction protein signals revealed significantly stronger claudin-4 expression in PP after surface correction (n = 5, *p < 0.05, ***p < 0.001).
