Beta- catenin and TCF mediate cell positioning in the intestinal epithelium by controlling the expression of EphB/ephrinBSynergie between tumor suppressor APC and the beta-catenin/Tcf4 target gene Tcf1Wnt/beta-catenin signaling regulates the expression of the homeobox gene Cdx1 in embryonic intestineLoss of Tcf7 diminishes hematopoietic stem/progenitor cell functionAberrant Polycystin-1 Expression Results in Modification of Activator Protein-1 Activity, whereas Wnt Signaling Remains UnaffectedDepletion of epithelial stem cell compartments in the small intestine of mice lacking Tcf 4Restricted high level expression of Tcf-4 protein in intestinal and mammary gland epithelium