An engineered Cry1Da amino acid sequence is provided that exhibits improved anthropoid insecticidal activity and an improved anthropogenic range compared to the naturally occurring Cry1Da protein toxin. Also provided are polynucleotide sequences intended for use in the expression of improved proteins in plants. Certain embodiments provide compositions containing insect inhibitory amounts of engineered proteins, as well as recombinant plants, plant sites, and seeds containing polynucleotide constructs encoding one or more of the improved engineered proteins.
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