There were also significantly higher (P<0.01) levels of VEGF in E.G7-OVA tumour homogenates (16.9±0.4 pg mg−1 protein) than in EL-4 tumour homogenates (12.5±0.5 pg mg−1 protein) (two mice in each group and four measurements per group). This evidence concerns the gene VEGFA and neoplasm.