Related Experiment Videos
O-antigen variation in Salmonella spp.: rfb gene clusters of three strains
N K Verma1, N B Quigley, P R Reeves
1Department of Microbiology, University of Sydney, New South Wales, Australia.
Journal of Bacteriology
|January 1, 1988
Abstract:
The O antigens of Salmonella serogroups A, B, and D differ structurally in their side-chain sugar residue. These genes encoding O-antigen biosynthesis are clustered in the rfb operon. We report here the molecular cloning and analysis of the rfb operons of Salmonella paratyphi A (serogroup A) and S. typhi (serogroup D). The regions of DNA nonhomology between the rfb operons of these serogroup A, B, and D representatives are identified, and the evolutionary derivation of serogroup A from a serogroup D progenitor is discussed.