Integrity of the 130 kDa polypeptide of Bacillus thuringiensis ssp. israelensis δ-endotoxin in KS sporulation medium

Z Ngalo Otieno-Ayayo, David M Chipman, Arieh Zaritsky, Kamal Khawaled

Research output: Contribution to journalArticlepeer-review

Abstract

The 130 kDa polypeptide appears to be the most susceptible of the polypeptides constituting the Bacillus thuringiensis ssp. israelensis δ-endotoxin to the proteases associated with sporulation. Stabilization of this polypeptide in the recently described K-S sporulation medium has been achieved through limiting its cleavage by removing contaminating proteases from the culture by washing. In this way, the complete δ-endotoxin profile is retained for studies on all of the constituent polypeptide fractions.
Original languageEnglish
Pages (from-to)377-381
Number of pages5
JournalInternational Journal of Tropical Insect Science
Volume14
Issue number3
DOIs
StatePublished - 1993

Keywords

  • Bacillus thuringiensis israelensis
  • 130kDa polypeptide
  • disappearance and stabilization
  • K-S medium
  • Bacillus ssp. thuringiensis israelensis
  • polypeptide deolypeptide de poids moléculaire 130 kDa
  • disparition et stabilisation
  • milieu K-S

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