Aj. Baumler et F. Heffron, MOSAIC STRUCTURE OF THE SMPB-NRDE INTERGENIC REGION OF SALMONELLA-ENTERICA, Journal of bacteriology, 180(8), 1998, pp. 2220-2223
The Salmonella enterica smpB-nrdE intergenic region contains about 45
kb of DNA that is not present in Escherichia coli. This DNA region was
not introduced by a single horizontal transfer event, but was generat
ed by multiple insertions and/or deletions that gave rise to a mosaic
structure in this area of the chromosome.