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Western blot images of claudin-1 and claudin-4 (A): The expression levels of claudin-1 (B) and claudin-4 (C) in the rat small intestine were quantitatively calculated after a treatment with 0.5% (v/v) SLG-30 for 1 h. Control, without treatment; treatment, treatment with 0.5% (v/v) SLG-30 for 1 h; and pretreatment, pretreatment for 1 h. The proteins were extracted after 4 h.
