Fig. 1From: Minicircle DNA-mediated endothelial nitric oxide synthase gene transfer enhances angiogenic responses of bone marrow-derived mesenchymal stem cellsCharacterization of rBMSCs. Tri-lineage differentiation of rBMSC was performed in vitro. a Undifferentiated rBMSC. b Alizarin red S staining of cells cultured for 14 days in osteogenic induction medium. c Alcian blue staining and toluidine blue staining of cells cultured for 14 days in chondrogenic induction medium. d Oil red O staining of cells cultured for 7 days in adipogenic induction medium. Scale bar = 100 μmBack to article page