A: Fluorescence-activated cell sorting analysis performed on in-vitro-cultured endothelial progenitor cells (EPCs) and mesenchymal stem cells (MSCs) to determine cell surface expression of CD133, kinase-insert domain receptor (KDR), CD44, and CD90. B: Representative immunofluorescence staining (40×) of CM-Dil (red) EPCs and MSCs in the stenotic-kidney, contralateral kidney (CLK), and left-ventricle sections. Cytokeratin, phaseolus vulgaris erythroagglutinin (PHA-E), peanut agglutinin (PA), CD31, and proliferating cell nuclear antigen (PCNA): Green, DAPI: Blue.