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Identification of endothelial progenitor cells using the cell surface markers, CD34 and CD133. Expression of CD34 (green, FITC) and CD133 (red, Cy3) was detected by fluorescence microscopy (magnification, ×200). The merge demonstrated the CD34/CD133 double-positive cells; endothelial progenitor cells. CD, cluster of differentiation; FITC, fluorescein isothiocyanate; Cy3, cyanine 3.
