Brain-specific genes have identifier sequences in their introns.

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Brain-specific genes have identifier sequences in their introns.

The 82-nucleotide identifier (ID) sequence is present in the rat genome in 1-1.5 X 10(5) copies and in cDNA clones of precursors of brain-specific mRNAs. One brain-specific gene contains more than one ID sequence in its introns. There is an excess of ID sequences to brain genes, and some ID sequences appear to have been inserted as mobile elements into other genetic locations. Therefore, brain ...

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Introns and their flanking sequences of Bombyx mori rDNA.

We obtained two different clones (16 kb and 13 kb) of B. mori rDNA with intron sequence within the 28S-rRNA coding region. The sequence surrounding the intron was found to be highly conserved as indicated in several eukaryotes (Tetrahymena, Drosophila and Xenopus). The 28S rRNA-coding sequence of 16 kb and 13 kb clone was interrupted at precisely the same sites as those where the D. melanogaste...

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Cell-specific expression of transfected brain identifier repetitive DNAs.

To define the neural-specific expression of rat repetitive identifier (ID) DNA, we co-transfected an intron B subclone of the rat growth hormone (rGH) gene, containing a tandem array of two type 2 repeats and a single ID monomer, and a plasmid conferring neomycin resistance into human SK-N-MC neuroblastoma, HeLa epidermal carcinoma, 293 kidney and 251 MG glioblastoma cells. Transcript analysis ...

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Mobile Introns Shape the Genetic Diversity of Their Host Genes

Self-splicing introns populate several highly conserved protein-coding genes in fungal and plant mitochondria. In fungi, many of these introns have retained their ability to spread to intron-free target sites, often assisted by intron-encoded endonucleases that initiate the homing process. Here, leveraging population genomic data from Saccharomyces cerevisiae, Schizosaccharomyces pombe, and Lac...

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Schizosaccharomyces U6 genes have a sequence within their introns that matches the B box consensus of tRNA internal promoters.

The gene for the U6 small nuclear RNA (snRNA) in the fission yeast Schizosaccharomyces pombe is interrupted by an intron whose structure is similar to those found in messenger RNA precursors (pre-mRNAs) (1). This is the only known example of a split snRNA gene from any organism--animal, plant, or yeast. To address the uniqueness of the S. pombe U6 gene, we have investigated the structures of th...

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ژورنال

عنوان ژورنال: Proceedings of the National Academy of Sciences

سال: 1984

ISSN: 0027-8424,1091-6490

DOI: 10.1073/pnas.81.3.713