Recombination in Escherichia coli and the definition of biological species.

Abstract excerpt

The DNA sequence of part of the gnd (6-phosphogluconate dehydrogenase) gene was determined for eight wild strains of Escherichia coli and for Salmonella typhimurium. Since a region of the trp (tryptophan) operon and the phoA (alkaline phosphatase) gene have been sequenced from the same strains, the gene trees for these three regions were determined and compared. Gene trees are different from species or strain...

Topics

• Alleles
• Base Sequence
• Cloning, Molecular
• Escherichia coli
• Genes, Bacterial
• Models, Genetic
• Molecular Sequence Data
• Operon
• Phosphogluconate Dehydrogenase
• Phylogeny
• Recombination, Genetic