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Overall structure of Aquifex aeolicus EmrA. EmrA is coloured by domain in yellow (β-barrel), green (lipoyl) and blue (α-helical coiled coil). The β-barrel contains the N and C-termini (labelled) and anchors EmrA in the inner membrane (IM) via an N-terminal TM helix (yellow tube). Due to poorly defined density for residues 322–342, there is a break in the β-barrel with residues 321 and 343 (red spheres) indicating the beginning and end of modelled residues for this loop.
