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Immunohistochemical staining of human retina shows moderate cytoplasmic positivity in photoreceptors and nerve fibers in retina. Subset of cells in renal tubules, seminiferous ducts, epididymis, small intestine, heart and skeletal muscle cells showed weak to moderate cytoplasmic positivity. Respiratory epithelial cells, cilia in fallopian tubes and few adrenal glands displayed membranous positivity. Other normal tissues were negative.