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Predicted model of the central cavity in EmhB. (A) The central cavity is viewed from the side parallel to the membrane, and the front monomer of EmhB is removed for ease of viewing. The N99, D101, F386, F458, and F459 residues lining the cavity are indicated. The A384 and A385 residues are not shown for ease of viewing. (B) A top view of the central cavity perpendicular to the plane of the membrane shows a ring formed by the residues F386, F458, and F459.
