Fig. 6.

Intergenic regions of the rtxACHBDE gene cluster (A) and vah1-plp gene cluster (B). The transcriptional start sites of hemolysin genes are indicated by solid triangles marked with +1. The −10 and −35 promoter sequences of hemolysin genes are indicted by underlined nucleotides labeled as −10 and −35 and are predicted to be σ⁷⁰ promoters. Black arrows indicate the start codons of genes. Lines indicating ribosomal binding sites of hemolysin genes are labeled “RBS.” The boxed sequences represent inverted repeats located with the HlyU-DNase I protected sequences, which are indicated as a protected region.