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Fig. 3. Ki67 staining of proliferating cells in an aneuploid population. Left panel shows a DNA profile of an aneuploid colorectal polyp, which also contains normal cells. The DI confirms that the aneuploid population is close to being diploid. The right panel shows the same sample stained at the same time with an antibody against the proliferation antigen, Ki67. The normal diploid cells are negative for Ki67, but the aneuploid cells are Ki67-positive.

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