Figure 2

Chromosomal position and genomic context of the bpr loci of B. pertussis. The positions of the 14 bpr loci are shown on the chromosomal map of the B. pertussis genome. The numbers give an approximate chromosome graduation in Mbp (A). The positions and orientations of the bpr loci in the B. pertussis genome are depicted by the red arrows (B). Grey arrows represent the ORF of the bpr-adjacent genes and their orientations according to the GenBank annotation. The estimated positions of sRNAs were determined considering the positions of the biotynilated probes (see Additional file 1, table S2) and the apparent lengths of the transcripts on the Northern blots. In case of multi-band detection only the longest transcript is represented.