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Immunohistochemical detection of CK2α expression in colorectal cancers, adenomas and adjacent normal colorectal mucosa. Staining was (A) negative in normal colorectal epithelium cells, (B, C) weak to moderate in the nuclei of colorectal adenoma cells, (D, E, F) and strong in the nuclei of colorectal cancer cells. (E is a close-up of the inset in D [framed in red]). Original magnification: × 200 (D), × 400 (A, B, C, E, F).
