Killer phenomenon in Ustilago maydis: Comparison of the killer proteins

Judy Kandel, Yigal Koltin

Research output: Contribution to journalArticlepeer-review


The three killer toxins of Ustilago maydis, P1, P4, and P6, were examined for physical, chemical, and biological properties. All toxins are proteins with molecular weights of approximately 10,000. They differed in their migration patterns on polyacrylamide gels, at pH 8.3, in thermolability, pH dependence, and biological activity. No immunological cross-reactivity was observed between the P6 and either P1 or P4 toxins. These criteria confirm the earlier distinction between the toxins that was based on genetic evidence.

Original languageEnglish
Pages (from-to)270-278
Number of pages9
JournalExperimental Mycology
Issue number3
StatePublished - Sep 1978


  • Ustilago maydis
  • killer phenomenon
  • viruslike particles


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