Fig. 1From: Engineered bone marrow mesenchymal stem cell-derived exosomes loaded with miR302 through the cardiomyocyte specific peptide can reduce myocardial ischemia and reperfusion (I/R) injuryIsolation and identification of bone marrow mesenchymal stromal cells (BMSCs). A The morphological characteristics of BMSCs observed under a inverted phase contrast microscopy. Scale bar = 50 μm. B Immunofluorescent technique was employed to analyze the surface markers (CD34, CD45, CD29 and CD90) of BMSCs. Scale bar = 50 μm. C Flow cytometric technique was applied to analyze surface markers (CD34, CD45, CD29 and CD90) of BMSCsBack to article page