Figure 2.

Nucleotide sequence of the H. ducreyi strain 35000 cdtABC genes together with the deduced amino acid sequence of the predicted proteins. Putative −35 and −10 regions are underlined, as are the putative ribosomal binding sites (SD). An inverted repeat located 3′ from the end of the cdtC gene is indicated by →← opposing arrows. Oligonucleotide primers (P) used in PCR reactions are numbered above the relevant sequences. Putative signal peptidase I cleavage sites are indicted by ↑. Putative transcription initiation sites detected by primer extension studies are indicated by ∗.