FIG. 3.

Amino acid sequence alignment of the E. coli (Ec) CitT protein with the 2-oxoglutarate/malate translocator from spinach (Spinacia oleraceae [So]) chloroplasts and five eubacterial gene products. Identical residues present in at least four of the sequences are framed in black; conservative exchanges are framed in gray. Asterisks indicate residues conserved in all sequences. Putative transmembrane helices within the CitT sequence are overscored. Details on the aligned sequences can be found in the text and in Table 1. Hi, Haemophilus influenzae; Bs, Bacillus subtilis; Hp, Helicobacter pylori.