Toxicity, binding, and permeability analyses of four Bacillus thuringiensis cry1 delta-endotoxins using brush border membrane vesicles of Spodoptera exigua and Spodoptera frugiperda

Research was conducted to examine the toxicity, binding and permeability of four Bacillus thuringiensis Cry1 toxins using brush border membrane vesicles from Spodoptera frugiperda and Spodoptera exigua. Results provide evidence that the toxicities of the four toxins differed significantly. Findings also indicate that there was no relationship between toxicity and dissociation of bound toxins from brush border membrane vesicles.