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Substance Name: Ustilago maydis viral toxin KP4
RN: 153552-15-9


  • Produced by Ustilago maydis virus, which infects the maize smut fungus; isolated from the maize smut fungus Ustilago maydis; derived from P4M2 protein; toxin is encoded by one or more genomic segments of resident double-stranded RNA viruses.
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Names and Synonyms

Name of Substance

  • Ustilago maydis viral toxin KP4


  • KP4 Killer toxin
  • KP4 Killer toxin, ustilago maydis
  • Ustilago maydis killer toxin KP4

Systematic Name

  • Toxin, prepro-(Ustilago maydis virus strain P4 P4 killer reduced)

Registry Numbers

CAS Registry Number

  • 153552-15-9

System Generated Number

  • 0153552159