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Superposition of the chaperone binding domains of T3S translocators. The superposition (DaliLite server [29]) of the chaperone-peptide complexes SycD:YopD (green), PcrH:PopD (purple) (PDB ID: 2XCB, chain A) and IpgC:IpaB (cyan) (PDB ID: 3GZ1, chain B) reveals a good spatial agreement within the key anchor residues of the YopD, PopD and IpaB sequence motifs.
