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Agarose gel electrophoresis of dsDNA plasmids extracted from killer yeasts. Lane 1 (125 ng), K. lactis; lane 2 (215 ng), S. occidentalis; lane 3 (215 ng), the plasmids of S. occidentalis with ExoIII digestion; lanes 4 to 6 (15, 15, and 10 ng, respectively), UV irradiation-cured S. occidentalis isolates.
