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A, Subunits a and i/j contribute dimerization motifs (enlarged in B). C, The unsharpened map shows that subunit k extends into the IMS to contact subunit e. D and E, Together, subunits b, e, g, and k create the structure that bends the lipid bilayer by almost 90°. The dashed orange line indicates the full length of subunit k. Scale bars, 25 Å.
