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Identification of human umbilical cord-derived mesenchymal stem cells. A: The human umbilical cord-derived mesenchymal stem cells (hUC-MSCs) showed high expression of CD29, CD44, CD73, CD90, and CD105, and did not express CD31, CD45, and CD271; B–D: hUC-MSCs were positive for Oil Red O, Alizarin red, and Alcian blue staining under the corresponding induction conditions (scale bars = 200 μm).
