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Double immunoflurescence staining in human urothelium and cultured urothelial cells. Both cytokeratin 17 (green) and nuclear staining (blue) immunoflurescence staining were observed in urothelium (A) and cultured urothelial cells (C). No expression of cytokeratin 17 was detected in urothelium (B) and urothelial cells (D) using negative control (no primary antibody). Scale bar: 250 μm.
