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Molecular Mechanisms Section

A layer of retinal pigment epithelium (RPE) cells isolated from a cow eye fluoresce brightly red when stained with an antibody to the RPE65 protein. Nuclei are stained blue with a nuclear-specific dye. Many RPE cells are binucleated. (Photomicrograph courtesy of R.N. Fariss, NEI).

Department of Health and Human Services NIH, the National Institutes of Health