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VEGF and VEGFR-1 are expressed in human CRCC tumors and cell lines. (A) Immnohistochemical staining of VEGF and VEGFR-1 in human CRCC tumor sections (brown staining). (B) Protein gel blot analysis of VEGFR-1 expression in CRCC cell lines. Protein gel blot of β-actin is included as a loading control. (C) VEGF ELISA analysis of VEGF levels in CRCC cells.
