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Structural repeat motifs. (A) A single Leu‐rich repeat (left) from ribonuclease inhibitor (right; PDB entry 2bnh). (B) A HEAT repeat (left) from the PR65/A subunit of protein phosphatase 2A (right; PDB entry 1b3u). (C) An ARM repeat (left) from β‐catenin (right; PDB entry 2bct). (D) An ankyrin repeat (left) from GABPβ (right; PDB entry 1awc).
