Cultural Conditions and Strain Improvement for Production of Bactobolin

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The cultural conditions for the production of bactobolin, an antitumor antibiotic produced by Pseudomonas yoshitomiensis, were studied using a mutant strain, C-17-20. The following cultural conditions were found to be suitable: 2.0% mannitol, 0.25% dried yeast, 0.5% (NH4)2SO4, 0.4% KCl, 0.02% K2HPO4 and 0.8% CaCO3; temperature, 25°C. The highest bactobolin production under the conditions was 189μg/ml, although the wild strain, Y-12278, produced only 4μg/ml in the basal conditions.
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