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Mol Gen Genet. 1989 Nov;219(3):429-38.

A genetic and molecular analysis of P-induced mutations at the glucose-6-phosphate dehydrogenase locus in Drosophila melanogaster.

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Department of Genetics and Developmental, Cornell University, Ithaca, NY 14853.


We examined P factor induced mutations of the Zw gene of Drosophila melanogaster in order to learn more about the site specificity of such mutations. Approximately 70,000 chromosomes were screened using a powerful positive selection scheme. As only two mutants were discovered, Zw is a "cold spot" for transposable element insertion. One mutation involved a complex P element associated chromosomal rearrangement which was used to define the orientation of the gene with respect to the centromere of the X chromosome. The second mutation was either a simple, non-dysgenically induced point mutation or a very unstable insertion.

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