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At least 775 records · Page 43Linked to original sources
PubMed1975

A link between streptomycin and rifampicin mutation.

Introduction of str A mutations frequently make "male" strains of Escherichia coli permissive to bacteriophage T7; certain rif mutations reverse the permissive effect of strA mutation. Permissiveness of the strA mutation is accompanied by enhanced transcription of bacteriophage T7 genome. Introduction of the nonpermissive rif allele to the permissive strA strain reduces or abolishes the transcription of T7 genome. Thus, a link is implied in the functioning of the ribosome and the RNA polymerase (RNA nucleotidyltransferase, EC 2.7.7.6).

Carbon Radioisotopes↗
PubMedDate not supplied

[Metabolic pathways responsible for consumption of aromatic hydrocarbons by microbial associations: molecular-genetic characterization].

Genes for catechol 1,2- and 2,3-dioxygenases were cloned. These enzymes hold important positions in the ortho and meta pathways of the metabolism of aromatic carbons by microbial associations that consume the following volatile organic compounds in pilot minireactors: toluene, styrene, ethyl benzene, o-xylene, m-xylene, and naphthalene. Genes of both pathways were found in an association consuming m-xylene; only genes of the ortho pathway were found in associations consuming o-xylene, styrene, and ethyl benzene, and only genes of the meta pathway were found in associations consuming naphthalene and toluene. Genes of the ortho pathway (C120) cloned from associations consuming o-xylene and ethyl benzene were similar to corresponding genes located on the pND6 plasmid of Pseudomonas putida. Genes of the ortho pathway from associations consuming o-xylene and m-xylene were similar to chromosomal genes of P. putida. Genes of the meta pathway (C230) from associations consuming toluene and naphthalene were similar to corresponding genes formerly found in plasmids pWWO and pTOL.

Bacteria↗