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Fig. 4. Structure of
-catenin complexes in the
-catenin destruction complex. Crystal structures of the
-catenin armadillo repeat domain in complex with the phosphorylated third 20aa repeat of APC (in red) and the
-catenin-binding domain of axin (in blue) were superimposed on the structure of the
-catenin armadillo repeat domain. The positions of the four phosphorylated residues in APC 20aa repeat 3 are shown.