FIG. 2.

Eleven groups of P. aeruginosa O-antigen biosynthetic gene clusters. Genes within the DNA sequences were identified by the GENEMARK algorithm (30) and are represented by arrows drawn to scale. Protein families, identified in queries to the PFAM database (1) and represented three or more times in the overall data set, are represented by single-letter designations. W indicates an ORF with several potential membrane-spanning domains. A detailed description of the families is provided in Table 3. Specific genes described previously in gene clusters O5, O6, and O11 are shown above the clusters. The stippled boxes represent the targeting elements used in recombinational cloning. The C-terminal coding region of wbpM, shown as an open arrow, is presumed to extend rightward of the cloned region, as shown. A denotes orfA, as described in the text. The G+C content of each cluster is shown.