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Bioactivity evaluation of SA/Oxy vesicles in hydrogels. (A) Alkaline phosphatase (ALP) expression of MSCs in hydrogels on day 7 and colorimetric quantification of ALP activity for day 3 blue, day 7 red. (B) Mineralization in hydrogels stained with Alizarin red S on day 28 and colorimetric quantification of mineralization for day 14 blue, day 28 red. (n = 4)
