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Fig. 2 . Proliferation and differentiation in mouse small intestine. The
proliferating compartment of an intestinal crypt of an adult mouse small
intestine, as revealed by Ki67 immunohistochemistry (brown), which stains
proliferating cells, and Alcian Blue staining, which detects mucosecretory
differentiated cells. Image courtesy of Verónica Rodilla and
Lluís Espinosa.