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Expression of ACE in CRC. The distribution and expression pattern of ACE in non-neoplastic colon mucosa (A and B) and colorectal carcinomas (C and D) was investigated by immunohistochemistry. ACE was found in (B and D) endothelial cells and (D) tumor epithelial cells. Hematoxylin and eosin (A and C); monoclonal anti-ACE antibody (B and D); hematoxylin counterstain. Original magnification, x400.
