Characterization of human UCB EPCs. The fluorescent micrograph showed that the UCB EPCs could take up Dil-Ac-LDL, (red), bind UEA-1 (green), and express CD133, (green), CD34, (green), and vWF (red). Nuclei were stained with Hoechst (blue) (scale bar=50 μm). Color images available online at www.liebertpub.com/scd