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Lipopeptides produced by Bacillus subtilis are known for their high antifungal activity. The aim of this paper is to show that at high concentration they can damage the surface ultra-structure of bacterial cells. A lipopeptide extract containing iturin and surfactin (5 mg mL−1) was prepared after isolation from B. subtilis (strain OG) by solid phase extraction. Analysis by atomic force microscope...
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