| 摘要 |
<p>A process for altering the insect host range (spectrum) of pesticidal toxins comprises recombining in vitro the variable region(s) (non-homologous) of two or more genes encoding a pesticidal toxin. Specifically exemplified is the recombining of the variable regions of two genes obtained from well-known strains of Bacillus thuringiensis var. kurstaki. The resulting products are chimeric toxins which are shown to have an expanded and/or amplified insect host range as compared to the parent toxins.</p> |
