FIG. 3.
Comparison of the upstream nucleotide sequences of the cfxA3 gene of strains 321, 595, 616, and 800, along with the partial sequence upstream of cfxA1 and cfxA2 (GenBank accession no. U75371 and AF118110, respectively). Sequence identity among the cfxA genes is indicated with asterisks. Sequence identity between blacfxA2 and blacfxA3 is indicated with dots. The −35 and −10 regions of putative promoter sequences of the cfxA genes are shown in boldface. The horizontal arrow indicates an inverted repeat (IR) of 25 bp found upstream of blacfxA3.