FIG. 2.

Nucleotide sequence alignment of vacA s1 and s2. The alignment shows nucleotides 36 to 108 and 36 to 135 of the s1 (GenBank accession no. U05676) and s2 (GenBank accession no. U29401) allelic types, respectively. Dots indicate the presence of a nucleotide identical to the nucleotide in the top sequence. A dash indicates a gap. U29401 and NL4600 represent s2 variants; U07145, PO30, and PO32 represent s1a variants; and NL4601 and PO12 represent s1b variants. The positions of the allele-specific probes are indicated by shading.