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The released cells from chondrogenically induced pellets were positive for (A) alcian blue and (C) collagen type II staining, while the control samples were negative for (B) alcian blue and (D) collagen type II staining. (E) On the gene level, they showed significant expression for chondrogenic-specific makers like SOX9 and COL2A1 as compared to control samples. Bar: 100 μm.
