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A. The antibody to K17 labels only a portion of the tumor as shown with immunofluorescent staining and DAB at a lower magnification in the inset (inset scale bar = 100µ). B,C. Using double immunofluorescent staining with Tuj-1 a small number of cells are co-labeled with both antibodies (arrowheads), but most K17(+) cells seem to follow a pattern of staining similar to K18/Sox2 antibodies. White scale bar = 50µ.
