FIG. 6.

Alignment of the 23-aminno-acid repeats of the BspA protein and the T. pallidum LRR protein (TpLRR). The amino acid positions of the BspA protein are indicated on the left. The one-letter amino acid code is used. An amino acid is included in the consensus if it is present at that position in more than half of the repeats. Amino acid positions with identical or a similar amino acid substitutions between the BspA consensus and the TpLRR consensus are underlined. X, any amino acid; a, alanine, valine, leucine, isoleucine, phenylalanine, tyrosine, or methionine; N, asparagine, cysteine, or threonine.