title: Species specificity of bacterial palindromic units.
abstract: We described previously a family of dispersed palindromic sequences highly repeated in Escherichia coli and Salmonella typhimurium genomes. These sequences, called PU (palindromic units), are located outside structural genes. We report here observations suggesting that PU may have a role in bacterial speciation.
mesh_terms: D001483:Base Sequence; D005075:Biological Evolution; D004926:Escherichia coli / Q000235:genetics*; D005798:Genes, Bacterial; D012486:Salmonella typhimurium / Q000235:genetics*; D013045:Species Specificity