Bone marrow-derived multipotent stromal cells (BM-MSCs) and adipose tissue-derived multipotent stromal cells (AT-MSCs) show the same immunophenotype, except for CD34 expression. (A, B): Representative histograms of BM-MSC (A) and AT-MSC (B) fluorescence-activated cell sorting (FACS) analysis. All AT-MSC donors showed a CD34+ population. Gray histograms are isotype control. (C): Cumulative data of FACS analysis of BM-MSCs and AT-MSCs for several surface markers. The expression of CD34 was significantly higher on AT-MSCs compared with BM-MSCs (data are means from four BM-MSC and five AT-MSC donors; statistical analysis was performed using a two-way analysis of variance; *, p < .05; **, p < .01; ***, p < .001). Abbreviations: AT, adipose tissue-derived multipotent stromal cells; BM, bone marrow-derived multipotent stromal cells; HLA, human leukocyte antigen; pos, positive.