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A) Effects of p-VEGF on tumor cell proliferation as measured by MTT assay (p < 0.01). B) VEGF transfection was used to construct plasmids expressing VEGF. The melanoma B16 cells, the cells transfected with p-VEGF, and the cells given exogenous VEGF, EGF, and CoCl2 can be easily identified by microscopy
