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Proc Natl Acad Sci U S A. 1986 Jan;83(2):404-8.

Molecular characterization of the Drosophila vermilion locus and its suppressible alleles.


We have cloned vermilion (v), one of the genes required for brown eye pigment synthesis in Drosophila, using a mutant (vH2a) "tagged" with the transposon P factor. Mutations that disrupt v gene expression are clustered within approximately 2 kilobases of DNA. A 1.4-kilobase transcript, homologous to this same region, is present in v+ RNA but absent in RNA from several v mutants. The spontaneous v alleles that are suppressed by the suppressor of sable [su(s)] are apparently identical insertions of 412, a copia-like transposable element. Preliminary evidence suggests that su(s)-suppressible alleles at other loci may also be 412 insertions.

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