The costs and benefits of killer toxin production by the yeast Pichia kluyveri.

Abstract excerpt

Numerous yeast species in many genera are able to produce and excrete extracellular toxic proteins (mycocins) that can kill other specific sensitive yeasts. Natural distributions of killer yeasts suggest that they may be important in maintaining community composition and provide a benefit to the toxin producing cells. The fact that not all yeasts are killers and that polymorphisms exist within some killer species...

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