Figure 2.

Organization of bad (benzoic acid degradation), ali (alicyclic acid degradation), and hba (4-hydroxybenzoic acid degradation) genes from R. palustris. All genes are contiguous on the chromosome. ORF 1 lies directly downstream of badB. Horizontal arrows indicate direction of transcription, but not necessarily transcriptional units. With the exception of the badDEFG operon, these have not yet been determined. No function has been proposed for the ORFs designated 1 and 2. Solid gray arrows indicate genes encoding proteins proposed to carry out reactions homologous to those of fatty acid degradation. Large black arrows indicate genes encoding proteins proposed to participate in reduction reactions involving transfer of low potential electrons. The hydrolase gene is indicated by vertical hatch marks, ABC transporter genes by slanted hatch marks and a putative regulatory gene by an open arrow.