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Competitive binding experiments that monitor the retention of fluorescein-labeled GU40C4 by immobilized VEGFR2 ECD in the presence of the indicated concentrations of unlabeled competitor (VEGF, unlabeled GU40C4 or a control peptoid not selected to bind VEGFR2). Only unlabeled GU40C4 competed the GU40C4-FITC•VEGFR2 ECD complex.
