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Figure 4.
Fig. 4. Residues involved in proton translocation and coupling.
Hydrogen bonds are represented by dashed black lines.
Transmembrane helices in the N- and C-terminal domains are
colored blue and red, respectively. Color code for atoms is as
in Fig. 3. (A) Stereo view parallel to the membrane. (B) Stereo
view along the membrane normal from the cytoplasmic side.
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