Figure 4From: Binding of ATP to vascular endothelial growth factor isoform VEGF-A165 is essential for inducing proliferation of human umbilical vein endothelial cellsMALDI-TOF spectrum overlay of VEGF-A 165 and the VEGF-A 165 -ATP complex. VEGF-A165 (27.5 μM), ATP (30 μM ATP). ATP (507.2 g/mol) causes peak broadening due to complex formation with VEGF-A165. The further addition of 60 μM Mg2+ has no measurable impact on the spectrum (data not shown).Back to article page