1C5K:
reference: The structure of TolB, an essential component of the tol-dependent translocation system, and its protein-protein interaction with the translocation domain of colicin E9., Carr S, Penfold CN, Bamford V, James R, Hemmings AM, Structure Fold Des 2000 Jan 15;8(1):57-66. PMID: 10673426

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