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Human epidermal growth factor 2 (HER2) and vascular endothelial growth factor (VEGF) expression levels in gastric cancer cells. NCI-N87Luc+ cells express HER2 (a) and VEGF (b), as detected by flow cytometry. (c) Detection of the expression levels of VEGF and VEGF-related receptors (VEGFR) by reverse transcriptase-polymerase chain reaction (RT-PCR). GAPDH, glyceraldehyde 3-phosphate dehydrogenase; HUVEC, human umbilical vein endothelial cell; NRP-1, neuropilin-1.
