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p27 is expressed in the proliferative compartment of the intestinal crypt (A) Graphic representation of crypt cell position in the small intestine. (B) Representative section of small intestinal crypt stained with H&E and antibodies to bromodeoxyuridine, phospho-histone H3, and p27 (magnification, ×600). Arrows point to p27-positive crypt cells. (C) Distribution of p27-positive staining in the crypt. Error bars indicate SEMs.
