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Immunophenotype and karyotype of human umbilical cord mesenchymal stem cells (HUC-MSCs). (a) The immunophenotype of HUC-MSCs as analyzed by flow cytometry assay. Representative flow cytometry analysis of HUC-MSCs after expansion to the third passage when labeled with typical HUC-MSCs antibodies against human antigens CD73, CD105 and CD31. (b) Normal karyotype observed with HUC-MSCs at passages 3.
