FIG. 6.

Putative MSS in inner membrane proteins. (A) T. litoralis and E. coli MalF proteins. In contrast to E. coli MalF, the T. litoralis protein has only six putative MSS (there are eight in E. coli MalF) and no large periplasmic loop between MSS3 and MSS4. MSS1 and MSS2 from E. coli MalF are missing in T. litoralis MalF. Since the numbering of the MSS corresponds to the E. coli sequence, the most N-terminal MSS of TMBP is termed MSS3. (B) T. litoralis and E. coli MalG proteins. The positions of the MSS appear to be conserved; the numbering is identical to that of the E. coli sequence. Tl, T. litoralis; Ec, E. coli. Asterisks indicate identical residues; dots indicate homologous residues.