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GENETICS OF ACETYLCHOLINESTERASE IN DROSOPHILA MELANOGASTER
Jeffrey C. Hall 1 and Douglas R. Kankel 1
1 California Institute of Technology, Pasadena, California;
Brandeis University, Waltham, Massachusetts and Yale University, New Haven,
Connecticut
Genes in Drosophila melanogaster that control acetylcholinesterase (AChE) were searched for by segmental aneuploidy techniques. Homogenates of flies containing duplications or deletions for different segments were assayed for enzyme activity. A region on the third chromosome was found for which flies having one does consistently gave lower AChE activity than euploid flies, which were in turn had lower activity than flies with three doses. The activity differences were in the approximate ratio 1:2:3. Fine structure deletion mapping within this region revealed a very small segment for which one-dose flies have approximately half-normal activity. To obtain putative AchE-null mutations, lethal mutations within this region were assayed. Four allelic lethals have approximately half-normal activity in heterozygous condition. These lethals probably define the structural locus (symbol: Ace) for AChE.
Submitted on January 29, 1976
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