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Panel 1: the CD133 antibodies stained intensely at the membrane and in the cytoplasm of cancer cells.
<p>(A): weakly positive or focally positive staining in 10% of cells; (B): moderately or strongly positive-staining involving 10% or more of the cells; (C) and (D): the staining of CD133 on the luminal surface and the basal surface of cancer cells. Panel 2: (A): cytoplasmic or nuclear expression of β-catenin was absent; (B): nuclear expression of β-catenin was less than 10% of the cancer cells; (C) and (D): widespread nuclear accumulation of β-catenin.</p