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Dual immunostaining for CD24 (brown) and CD44 (red) in invasive carcinomas of the breast. A. CD24 expressing breast cancer cells. B. Invasive carcinoma cells positive for CD44 and negative for CD24. Notice that there is minimal CD24 (brown) reactivity in this area. The expression of CD24 and CD44 is heterogenous within invasive carcinomas. Original magnification × 400.
