title: [Sensitivity of dissociation variants of Micrococcus luteus to the action of delta-endotoxins of Bacillus thuringiensis].
abstract: Endotoxins of Bacillus thuringiensis subsp. tenebrionis produced an antibiotic effect on three out of the four species of micrococci tested, showing an activity of 10-23 units/mg, comparable with that of bacitracin. The R variants of Micrococcus luteus were more than twice as resistant to the action of delta-endotoxins as cells of the S and M types. Enhanced growth of the tested microorganisms at concentrations of antibiotics large enough to inhibit the growth of the S and M variants, but insufficient to suppress the R-variant, was shown to be determined by the intense development of the latter variant.
authors.forename: T G
authors.initials: TG
authors.lastname: Iudina
authors.forename: E S
authors.initials: ES
authors.lastname: Mil'ko
authors.forename: N S
authors.initials: NS
authors.lastname: Egorov
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000494:pharmacology*; D001413:Bacillus thuringiensis / Q000378:metabolism*; D000083722:Bacillus thuringiensis Toxins; D001414:Bacitracin / Q000494:pharmacology; D001426:Bacterial Proteins / Q000302:isolation & purification / Q000494:pharmacology*; D001427:Bacterial Toxins; D004731:Endotoxins / Q000302:isolation & purification / Q000494:pharmacology*; D014644:Genetic Variation; D006460:Hemolysin Proteins; D008826:Microbial Sensitivity Tests; D016982:Micrococcus luteus / Q000187:drug effects* / Q000235:genetics / Q000254:growth & development
chemical_list: D000900:Anti-Bacterial Agents; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D004731:Endotoxins; D006460:Hemolysin Proteins; C030956:insecticidal crystal protein, Bacillus Thuringiensis; D001414:Bacitracin