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The short field-life of Bacillus thuringiensis (Bt) insecticidal crystal protein has limited its use. When the Bt toxin is produced in Pseudomonas fluorescens it can be encapsulated and retain its effectiveness for two to three times longer than other Bt formulations. In order to improve Bt expression, we have synthesized cryIA(c) Bt -endotoxin encoding region (GenBank AF537267) according to the usage...