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The expression levels of stem cell surface markers in PANC-1 spheroids and non-spheroids (the parental cells). Flowcytometric analysis of CD133, CD24, and CD44 in A) PANC-1 non-spheroids and B) PANC-1 spheroids, C) the percentages of CD133-, CD24- and CD44-positive cells in PANC-1 spheroids relative to the PANC-1 non-spheroids (parental cells without hanging drop)
