Sequencing of the 16S rRNA genes from enterococcal strains used as starters suggested the existence of specialized taxa of lactic acid enterococci within the species Enterococcus durans and E. faecium and a new species, E. lactis. Comparisons showed that the 16S rRNA genes of closely related species have the same sets of variable positions with different combinations of nucleotides. The presence of identical combinations of nucleotide substitutions in different species was assumed to result from a transfer of genetic information via gene conversion between different rRNA operons. Such events were presumably associated with speciation in bacteria.
Russian Journal of Genetics – Springer Journals
Published: Mar 25, 2006
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