FIGURE 2: Genomic organization of genes in the dad locus varies in Pseudomonas species. (A) Schematic showing the configurations of dad loci in Pseudomonas. Genomic affinity groups [39-43] were classified based on the organization (A) and constituents (B) of the dad locus. Gene products considered were DadR (AsnC-type regulator, red), DadA (D-amino acid dehydrogenase, yellow), DadX (catabolic alanine racemase, grey), and DadY (Rid2 subfamily protein, blue). The number of species belonging to each group is shown in parentheses. (B) Distribution of dad genes in Pseudomonas. The presence (filled boxes) or absence (empty boxes) of each gene in the dad locus is indicated for the groups shown in A.