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- W1541907416 abstract "Sporulation mutants of Bacillus subtilis , blocked either in the citric acid cycle or in another pathway necessary for uracil incorporation during the developmental period, were tested for their sporulation response to different carbon sources. All of the citric acid cycle mutants and all but one of the other mutants failed to respond. The one phenotypically curable mutant, 60764, responded to most metabolizable carboxylic acids, such as acetate and fatty acids, and to some other carbon sources. For an optimal response, it was necessary to add the compound at a certain concentration and time (0.08 m for acetate, when the extinction of the culture at 600 nm was 1). A liquid medium was devised in which an appreciable amount of antibiotic activity against Staphylococcus aureus was produced by our standard strain 60015. The mutant 60764 produced, even in the presence of palmitate, 20 times less antibiotic and sporulated more slowly than 60015. The antibiotic activity in both strains consisted of three major and several minor molecular species, as detected by thin-layer chromatography. When purified antibiotic was added to an exponentially growing culture of our standard strain of B. subtilis , lysis ensued, the extent of which increased with the concentration of the antibiotic added; later, resistant bacteria grew up. Three mutants unable to produce antibiotic activity were isolated and found to be deficient in sporulation. These findings show the close correlation between sporulation and antibiotic activity, but they do not prove that antibiotic activity is needed for sporulation." @default.
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- W1541907416 date "1968-10-01" @default.
- W1541907416 modified "2023-09-25" @default.
- W1541907416 title "Curing of a Sporulation Mutant and Antibiotic Activity of Bacillus subtilis" @default.
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- W1541907416 doi "https://doi.org/10.1128/jb.96.4.1255-1265.1968" @default.
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