Fig. 1

A schematic representation of the rpoB gene which encodes the β subunit of RNAP is shown (adapted from Jin DJ al. [3]). The shaded region on the β subunit is the RRDRs. The amplified portion is the region of the mutation involved in this study. The sequence consists of amino acid sequences of R. anatipestifer, F. psychrophilum, E. coli and M. tuberculosis, with the region RRDRs underlined. The asterisk at the bottom indicates that the corresponding amino acid at the top is conserved in the four strains. The mutation types associated with rifampin resistance in this study are listed above the sequence. The type identified in the isolates is underlined. The rest are spontaneous mutation types, and insert mutation types are framed. R494K was shared by both