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(A) Sox9 staining of the intestine iTcfap2c (upper panel) and controls (lower panel). (B) Alcian blue-PAS staining of the intestine iTcfap2c (upper panel) and controls (lower panel). Arrowheads indicate Paneth cells, found at the bottom of the crypts by blue coloring of their granules. Scale bar = 100 µm.
