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Representative images of immunofluorescent staining for ZO-1 (green in right 2 columns) and occludin (green in left 2 columns) in human corneal epithelial cells after 2 and 6 hrs exposure to MPS A solution with cells in the normal culture medium as control. Hoechst 33342 (blue) or PI (red) was used for cell nuclear counterstaining, respectively.
