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HUVECs were seeded on 24-well Matrigel coated plates at a density of 1.2×105 cells/well. After treated with different concentrations of Endostar for 16 hours, capillary tube structures were photographed (magnification×100) and the branch points in three random fields per well were quantified. Representative capillary tube structures were shown. *P<0.05 versus the control group.
