Fig. 4From: Expression, purification and functionality of bioactive recombinant human vascular endothelial growth factor VEGF165 in E. coli Effect of VEGF165 on HUVEC cells proliferation. HUVEC cells were grown to confluence and then incubated with serum free RPMI medium (used as control), 200 and 500 ng of recombinant VEGF165. Significant differences: ** means p < 0.05Back to article page