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Effect of WCAF on apoptosis and angiogenesis in colon carcinoma. (A,C) Tumor apoptosis was assessed by TUNEL assay (×400), ** p < 0.01 vs. control group. △ P< 0.05 vs BEV group (B,D) Expression of CD31 protein in four subcutaneous xenografts in nude mice (immunohistochemical staining, ×400), ** p < 0.01 vs. control group. △ P< 0.05 vs BEV group.
