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Surface marker expression confirms the mesenchymal phenotype of UMSC. UMSC were labeled with fluorescent-tagged antibodies (red) and compared to unlabeled controls (blue). A rightward shift in peaks indicates the presence of the stained markers. UMSC expressed the markers CD90 (a), CD73 (b), and CD105 (c). The lack of the rightward shift in (d) indicated that UMSC do not display the markers CD14, CD20, CD34, and CD45
