The ileal bile acid-binding protein (IBABP) is important for the reabsorption of bile salts in the distal small intestine. Studies with the human IBABP gene (FABP6, on chromosome 5q33.3-q34) defined the major transcription start site and identified conserved elements. A consensus element for the caudal-related homeobox factor CDX2 was functional in gel-shift assays and in transfection experiments.
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