Defective P element insertions affect the expression of sn-glycerol-3-phosphate dehydrogenase alleles in natural populations of Drosophila melanogaster.

Abstract excerpt

A distinctive and geographically widespread category of low-activity variant at the Gpdh locus in Drosophila melanogaster is shown to have defective P elements inserted between the TATA box and the transcription start site. In four examples the insertion was a single 1.15 kilobase (kb) KP element, whereas in another variant there were two KP elements in tandem. A sixth example contained a 0.61 kb defective P...

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