Molecular genetics of a biological clock in Drosophila

T. A. Bargiello, M. W. Young

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Ninety kilobase pairs (kb) of DNA have been isolated from the 3B region of the X chromosome of Drosophila melanogaster. Previous cytogenetic analyses have placed a gene required for rhythmic behavior (per) in this chromosomal interval. Physical characterization of a series of chromosomal rearrangements altering per locus activity indicates that DNA affecting behavioral rhythms is found in a 7.1-kb HindIII fragment. A single 4.5-kb poly(A)+ RNA is transcribed from this DNA in a wild-type pupae and adult flies. The transcript is eliminated by a per mutant that retains some rhythmic activity, but this mutant substitutes two novel transcripts, 11.5 kb and 0.9 kb. It is suggested that the new poly(A)+ transcripts provide residual per locus activity.

Original languageEnglish (US)
Pages (from-to)2142-2146
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number7 I
StatePublished - 1984
Externally publishedYes

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