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| Modern Genetic Analysis Chapter 11. Applications of Recombinant DNA Technology Recombinant DNA Technology in Eukaryotes Figure 11-17. Transgenic Drosophila expressing a bacterial b -galactosidase gene. Drosophila was transformed with a construct consisting of the E. coli lacZ gene driven by a Drosophila heat shock promoter. The resulting flies were heat shocked, killed immediately, and stained for b -galactosidase activity, detected by production of a blue pigment. Transformed fly is at right, normal fly at left. (John Lis)

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