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The effect of biRGD–siVEGFR2 on angiogenesis and tumor proliferation. (A) Immunohistochemical staining with CD31 was used to detect neovascularization in tumor tissues at ×400 original magnification (indicated by arrows). (B) Immunohistochemical staining with ki67 was used to detect cell proliferation in tumor tissues at ×400 original magnification (indicated by arrows). Positive cells were brown. Bar = 20 μm.
