Fig. 6.

Stabilization of the overall structure of Helicobacter pylori flavodoxin by the carboxy-terminal residues. The part of the protein that is altered in the elongated form is shown in green. Side-chain atoms are only shown for residue Phe163 of the short form of H. pylori flavodoxin, and of contacting residues. Amino acids belonging to the hydrophobic core of the protein are shown in cyan, and amphipatic residues shielding Phe163 from the solvent are shown in orange.