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Molecular and General Genetics MGG

, Volume 165, Issue 3, pp 323–330 | Cite as

Tryptophan genes in Rhizobium—Their organization and their transfer to other bacterial genera

  • A. W. B. Johnston
  • M. J. Bibb
  • J. E. Beringer
Article

Summary

R. leguminosarum trp alleles mapped by R68.45-mediated recombination were located in three distinct chromosomal regions. We isolated three derivatives of R68.45 that carried different trp genes of R. meliloti. Each of the plasmids suppressed all of the R. leguminosarum trp alleles in a particular region. The R-primes were transferred to strains of P. aeruginosa carrying mutations in different trp genes. The plasmid pAJ24JI suppressed trpA, B and F mutants, pAJ73JI suppressed trpC and D and pAJ88JI suppressed a trpE mutant. When the R-primes were transferred to E. coli trp strains they failed to suppress any trp mutants. A derivative of pAJ24JI was isolated which was able to suppress trpA and F mutants of E. coli.

Keywords

Recombination Tryptophan Rhizobium Chromosomal Region Bacterial Genus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • A. W. B. Johnston
    • 1
  • M. J. Bibb
    • 1
  • J. E. Beringer
    • 1
  1. 1.John Innes InstituteNorwichEngland

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