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Immunofluorescent staining of claudin-1 in the nerve fibers in incisor periodontal ligaments (A) and gingiva of mandibular third molar (B). The perineurium [arrows in (A)] and the cell periphery of junctional epithelia [arrows in (B)] were labeled with anti-claudin-1. Asterisk shows the surface of junctional epithelia. MA, myelinated axons; E, enamel space. Bars = 50 μm.
