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Crystal structure of NttC. (A) Secondary structure of NttC shown as cartoon in two orientations. (B) Electrostatic potential of the NttC surface. (C) NttC shown as cartoon with the internal cavity (calculated by fpocket) shown as spheres. (D) Sequence conservation of NttC shown on the surface structure and (E) as sticks with the internal cavity shown as spheres. Amino acid identities and similar residues are indicated by background shading in cyan and yellow, respectively.
