Fig. S10.

Alignments of sequences of c-subunits. (A and B) Selected sequences from various eukaryotic classes and sequences of c-subunits where the structure of the c-ring has been characterized, respectively. The positions of the N- and C-terminal α-helices are shown. Conserved and substituted residues are black and red, respectively. The conserved glutamate involved in proton translocation is highlighted in blue, the lysine residues at the beginning of the C-terminal α-helix are purple, and alanine residues that influence the symmetry of the ring are green.