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Effect of the DRS HE800 derivative on vascular tube formation on Matrigel from endothelial progenitor cells (EPCs). Photographs show vascular tube formation by EPCs previously treated (a) with 5% of fetal calf serum (control); (b) with proangiogenic factor VEGF (40 ng/mL); and (c) with proangiogenic factor VEGF (40 ng/mL) and DRS HE800 derivative (10 μg/mL).
