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Immunofluorescence staining of the tight junction proteins occludin and zonula occludens-1 of gingival keratinocytes treated for 48 h with the Dual Zinc plus Arginine aqueous solution, the Dual Zinc plus Arginine dentifrice, and the regular fluoride dentifrice. Arrows indicate discontinuities in protein labeling. This analysis was performed three times; a representative experiment and a representative field of this experiment is presented.
