Extragenic suppression of two ribosomal protein cistrons lying near the rif locus in Escherichia coli

Lambda transducing bacteriophage carrying deletions of the argCBH-rpoBC region of the Escherichia coli chromosome

Deletions in the rpoBC region have been transferred to phage lambda and characterized in detail by genetic, structural, and functional tests. We thus extend and confirm knowledge of the organization of this part of the chromosome. The new phages are useful tools for studying the genes for the bacterial transcription and translation machinery.

[Correlation between a novel phenotype towards streptomycin and the binding of an additional protein to the ribosome in mutants of Escherichia coli B]

Mutants of Escherichia coli have been isolated containing streptomycin suppressors that exhibit novel phenotypes with respect to strA alleles. In one class of these mutants, the suppressor effect parallels a strong binding to the ribosome of an additional protein in at least stoichiometric amounts. Transduction experiments confirmed that the level of suppression and the degree of binding of this protein were correlated.