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Immunohistochemistry staining of HT29 tumors in nude mice from the tCA-treated group and the control group. Original magnification, ×100. (A) Acetyl-H3; (B) cleaved caspase 3; (C) cleaved poly ADP ribose polymerase; (D) Bcl-2; and (E) Bax. tCA, trans-cinnamic acid.
