Evidence for the exchange of segments between genomes during the evolution of lambdoid bacteriophages.


Heteroduplexes between the DNA molecules of 12 lambdoid phages were analysed by electron microscopy. The positions of the regions of base sequence homology between the DNA molecules divide them into 35 segments, most of which have a number of alternative forms (alleles), which in general must be functionally homologous but which differ in base sequence and… (More)


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