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Genetics, Vol 142, 459-470, Copyright © 1996
INVESTIGATIONS |
Rearrangements Involving Repeated Sequences Within a P Element Preferentially Occur Between Units Close to the Transposon Extremities
F. Paques, B. Bucheton and M. Wegnez
Present address: Rosenstiel Center, Brandeis University, 415 South St., Waltham, MA 02254-9110.
In a previous report we described rearrangements occurring at a high rate (30% of the progeny of dysgenic flies) within a cluster of 5S genes internal to a P element. These events were characterized as precise amplifications and deletions of 5S units. Here we analyze recombination events within P elements containing two repeated arrays of 5S genes flanking a central white gene. Deletions (50%) and duplications (3%) of the white gene together with various amounts of flanking 5S genes were observed. These recombinations occur preferentially between the most external 5S units of P transposons. Such rearrangements could be favored by interactions between the proteins bound to the P terminal sequences.
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