Fig 4.

Regulatory regions of the paa gene cluster in strain AS 1.542. Upstream DNA sequences of the paaK (I), paaA (II), paaYZ (III), and paaRI (IV) genes are shown in 5′ → 3′ orientation relative to the translation start codons of the respective genes. The determined transcription start site is in boldface, and bent arrows indicate the direction of transcription; the derived −10 and −35 regions are underlined. PaaR binding sites are indicated by boxes with solid borders, and GlxR binding sites are indicated by dotted boxes with dotted borders.