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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Extensive segments of the Escherichia coli K12 chromosome in Proteus mirabilis diploids.

Various Escherichia coli K12 Hfr donors transfer at low frequency portions of the E. coli genome to Proteus mirabilis. By remating such Proteus hybrids with the same or a different E. coli Hfr strain, other genetic characters could be added to yield diploid Proteus hybrids which contained more than 30 percent of the E. coli genome. The extent of the E. coli genetic material in these unstable Proteus diploid hybrids included segments with the following selected markers: gal, lac, ara, mel, mtl, and malA. Unselected markers known to map throughout this region of the chromosome were also detected in these hybrids. Among the markers expressed in Proteus hybrids with the E. coli malA region was the receptor site for coliphage lambda. Although plaques were not seen, lambda was adsorbed by the Proteus hybrids. Examination of DNA from the various Proteus hybrids by CsCl density gradient centrifugation showed a satellite component of E. coli DNA with a size that corresponded to the extent of the E. coli genome present as determined by genetic analysis.[1]

References

  1. Extensive segments of the Escherichia coli K12 chromosome in Proteus mirabilis diploids. Wohlhieter, J.A., Gemski, P., Baron, L.S. Mol. Gen. Genet. (1975) [Pubmed]
 
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