FIG. 2.

Amino acid alignment of TprK showing six different sequences in the T. pallidum Sea81-4 strain harvested from a single infection. Conserved regions are indicated by black shading; V regions have white and gray shading. The V region that exhibits the greatest diversity is V6, with six different sequences; in comparison, only two different sequences are found in V1. For ease of visualization, the conserved C- and N-terminal portions of the protein and 64 amino acids of conserved sequence between V1 and V2 are truncated (//). (The GenBank accession numbers of the sequences shown are AY346063 to AY346068.)