ANG and neoplasm: To further confirm our results from the protein antibody array, we checked the levels of ANG (Figs. 4A and 4D), Ang-1 (Figs. 4B and 4E), and VEGF (Figs. 4C and 4F) in tumor-conditioned medium, endothelial cell-conditioned medium and in conditioned medium from co-cultures using ELISA in cells that were untransfected, transfected with scrambled vector, puPA, puPAR or pU2.