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Effect of radiation on CSCs. MC1 and UM2 xenografts were treated with radiation and the proportion of CSCs analyzed after 2 weeks using flow cytometry. (A) Flow cytometric detection of CD44+ CD24- cells (upper left quadrant) in untreated and treated UM2 xenografts. (B) Flow cytometric detection of CD44+ CD24- cells in untreated and treated MC1 xenografts. *P < .05 compared with untreated, n = 2–15.
