Eduardo Thüroff

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To define the extent of intervening sequences required for efficient splicing of the CYH2 gene in Saccharomyces cerevisiae, we have constructed a series of intron mutations. Artificial intron extensions of more than 300 bp of the natural intron lead to an inhibition of splicing where-as intron deletions lead to a drastic improvement of the splicing(More)
In D. virilis salivary glands transcripts of two early gland protein genes, Egp-1 and Egp-2, which encode putative secretory proteins, accumulate in all cells from the first to mid third larval instar. Subsequently the transcripts disappear from the cytoplasm of the corpus cells, but not from their nuclei, where they accumulate at the chromosomal site of(More)
Using the structural gene for the ribosomal protein L3 from Saccharomyces cerevisiae as a probe, we isolated a homologous fragment from genomic DNA of Schizosaccharomyces pombe. Analysis of the plasmid carrying this fragment by hybridization selection and 2D-electrophoresis revealed a 31 kDa ribosomal protein. Transformation of the vector pDB248x containing(More)
The CYH2 gene from Saccharomyces cerevisiae containing one 510 bp intron is spliced inefficiently. We have shown previously that a non-conserved sequence within the intron is responsible for this low splicing efficiency. Using synthetic oligonucleotides comprising the identified region we show in this report that a very short region contains the specificity(More)
From the Drosophila virilis late puff region 31C, we microcloned two neighbouring genes, Kil-1 and Kil-2, that encode putative Kunitz serine protease inhibitor like proteins. The Kil-1 gene is expressed exclusively in prepupal salivary glands. Using a size mutant of the KIL-1 protein and MALDI-TOF analysis, we demonstrate that during pupation this protein(More)
Genes from two Drosophila virilis intermoult puffs were isolated by microcloning. From puff 16A on the X-chromosome a 2.9 kb DNA fragment was obtained, which hybridizes with three transcripts. Two of them represent the mRNAs for larval glue proteins. They are found in different abundancies in third larval instar salivary glands, but also in minor amounts in(More)
We have developed an efficient transcription system in isolated yeast nuclei. If MnCl2 is substituted by CdCl2, degradation of newly synthesized RNA is markedly reduced. This effect is due to the inhibition of nuclear ribonuclease activity, since microsomal ribonuclease activity is less affected by the cation. The extent to which the addition of CdCl2 to(More)
We have studied the effect of acrylonitrile on the transcription of specific genes of Saccharomyces cerevisiae. The results presented demonstrate that ACN disturbs the coordinated response of ribosomal protein genes and causes a dramatic induction of the LEU2 gene, which might be due to metabolites of ACN.
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