FIG. 1.

Relevant strain and plasmids used to clone and sequence DNA adjacent to the pca operon from strain ADP1. Gene designations are dca, dicarboxylic acid; pca, protocatechuate; qui, quinate and shikimate; pob, 4-hydroxybenzoate; and ppa, phenylpropenoid and phenylpropanoid. Above the layout of genetic sections, delineated by the gray lines, are the outlines of pathways for dissimilation of aromatic and hydroaromatic compounds. Genes required for the illustrated biochemical transformations are shown above the related arrows. Those encircled have homologs among the dca genes. The deletion within strain ADP7529 was identified as part of this study.