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HCEP cells did not express the cornea-specific marker cytokeratin 3 (green) (A) but did express nuclear p63 transcription factor (green) (B). HCEP cells stained with AlexaFluor488 secondary antibody without any primary antibody were served as the negative control (C). Abbreviations: DAPI, 4′,6-diamidino-2-phenylindole.
