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Organ-specific localization of OCLN, JAM-A and ZO-1 in canine duodenum, lung, liver, and kidney, as detected by immunohistochemistry. (A) OCLN, (B) JAM-A and (C) ZO-1 immunostaining was detected in all organs examined. Boxes in the upper panels (magnification, ×200) are areas magnified in the lower panels (magnification, ×400). Arrows indicate positive staining. OCLN, occludin; JAM-A, junction adhesion molecule A; ZO-1, zona occludens 1.
