New broad spectrum killer toxins have been found in yeasts of the genu
s Debaromyces. The toxins from D. polymorphus and D. hansenii inhibite
d the growth of both ascomycete and basidiomycete yeasts. A detailed s
tudy of the interstrain and interspecies specificity of these toxins r
evealed four phenotypes: K, KS, S, and N.