FIG. 1.

Structural predictions for TatA, TatB, and TatE. Predicted structures were determined with the PSIPRED program at http://bioinf.cs.ucl.ac.uk/psipred/. (a) Predictions for TatA and TatE. Secondary structural elements common to both proteins are shown with a solid line, and those unique to TatE are shown with a dotted line. (b) Structural prediction for TatB. α-Helical regions are represented as cylinders, and β-sheets are represented as arrows. The transmembrane α-helical domains of TatA, TatB, and TatE are black, and the strongly amphipathic α-helical domains are white. Further predicted helical regions are grey.