FIG 1.
Comparison of the regulatory regions of constitutively expressed erm(B) from C. coli DZB4, C. jejuni C179b, and 25 other C. coli strains (shown in Table 1) with the corresponding region of inducibly expressed erm(B) of Tn917. RBS1 and RBS2 represent the ribosome binding sites of the leader peptide and erm(B), respectively. The ORFs corresponding to the 27-aa leader peptide, the 5′ terminus of erm(B), and the fosfomycin resistance gene fosXCC are shown as boxes. The arrows indicate IR1 to IR8, which are responsible for the stem-loop structures of mRNA in Tn917. Regions of 100% homology are marked by gray shading. The 210-bp deletion in C179b and the 635-bp substitution in DZB4 are indicated.