Figure 1. VEGFR-1 kinase activity was measured in a radiometric assay using the following reaction conditions: 60 mM HEPES-NaOH, pH 7.5, 3 mM MgCl2, 3 mM MnCl2, 3 µM Na-orthovanadate, 1.2 mM DTT, ATP (variable), 2.5 µg/50 µl PEG20,000, Substrate: PolyEY5 µg/50 µl, recombinant VEGFR-1: 100 ng/50 µl.
Figure 3. Dose dependence curve of VEGFR-1 kinase activity: DELFIA® data generated using Phospho-Tyrosine Mouse mAb (P-Tyr-100) #9411 to detect phosphorylation of substrate peptide (#1310) by VEGFR-1 kinase. In a 50 µl reaction, increasing amounts of VEGFR-1 and 1.5 µM substrate peptide were used per reaction at room temperature for 30 minutes. (DELFIA® is a registered trademark of PerkinElmer, Inc.)
Figure 5. Staurosporine inhibition of VEGFR-1 kinase activity: DELFIA® data generated using Phospho-Tyrosine Mouse mAb (P-Tyr-100) #9411 to detect phosphorylation of VEGFR-1 substrate peptide (#1310) by VEGFR-1 kinase. In a 50 µl reaction, 50 ng VEGFR-1, 1.5 µM substrate peptide, 20 µM ATP and increasing amounts of staurosporine were used per reaction at room temperature for 30 minutes. (DELFIA® is a registered trademark of PerkinElmer, Inc.)
Figure 4. Peptide concentration dependence of VEGFR-1 kinase activity: DELFIA® data generated using Phospho-Tyrosine Mouse mAb (P-Tyr-100) #9411 to detect phosphorylation of substrate peptide (#1310) by VEGFR-1 kinase. In a 50 µl reaction, 50 ng of VEGFR-1 and increasing concentrations of substrate peptide were used per reaction at room temperature for 30 minutes. (DELFIA® is a registered trademark of PerkinElmer, Inc.)
Figure 2. Time course of VEGFR-1 kinase activity: DELFIA® data generated using Phospho-Tyrosine Mouse mAb (P-Tyr-100) #9411 to detect phosphorylation of VEGFR-1 substrate peptide (#1310) by VEGFR-1 kinase. In a 50 µl reaction, 50 ng VEGFR-1 and 1.5 µM substrate peptide were used per reaction. (DELFIA® is a registered trademark of PerkinElmer, Inc.)