Representation of the intergenic region between orfMP and fhaB of B. holmesii. Partial amino acid sequences are shown below the respective coding DNA sequences. The GTG start codon of fhaB and the ATG start codon of the neighbouring orfMP coding for a putative membrane protein are given in bold letters. The putative Shine/Dalgarno sequence of fhaB is shown in italics and underlined. Transcriptional start sites of the constitutively synthesized transcripts P1 and P2 and of the bvg-dependent transcript P3 of fhaB are marked by arrows. The region protected from DNaseI digestion in footprint experiments with BvgABH-P is underlined. The sequence motifs BS1 to BS4 showing similarity to the BvgA consensus binding site in B. pertussis promoters are indicated by horizontal arrows above and below the DNA sequence. Nucleotides which match the consensus sequence are marked in bold letters.