Figure 6. Immunofluorescence staining patterns of cell-junction proteins of HCE cells at passage 101. A: human zonula occludens protein 1 (ZO-1). B: human N-cadherin. C: human connecxin-43. D: human integrin αv/β5. Positive expression of the cell-junction proteins of HCE cells was shown. Scale bar: 50 μm.