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Analysis of differentiation and mineralization (n = 3). (a) ALP activity of MDPC-23 cells in the experimental group was approximately 1.4 times higher than that in the control group on day 7 (* p < 0.01). (b) The mineralized nodules were visualized by alizarin red S staining. (c) The number of mineralized nodules induced by the DPP-derived RGD-containing peptide rose by approximately three times (* p < 0.01).
