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EXTENSION OF THE LIMITS OF THE XDH STRUCTURAL ELEMENT IN DROSOPHILA MELANOGASTER
William Gelbart 1, Margaret McCarron 1, and Arthur Chovnick 1
1 Genetics and Cell Biology Section, Biological Sciences Group
University of Connecticut, Storrs, Connecticut 06268
Experiments expanding the array of mutants affecting the xanthine dehydrogenase (XDH) structural element in Drosophila melanogaster are described. These include rosy eye color mutants which exhibit interallelic complementation, and mutants with normal eye color but lowered levels of XDH. Evidence is presented which argues that these are structural alterations in the enzyme. Recombination experiments were performed using these mutants as well as some electrophoretic variants. The two ends of the rosy locus are marked with mutant sites which are clearly structural in nature; the XDH structural element and the rosy null mutant map are completely concordant. A possible procedure to recover control element mutants is described.
Submitted on April 29, 1976
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