Search for dissertations about: "NUCLEAR RIBOSOMAL DNA"

Showing result 1 - 5 of 28 swedish dissertations containing the words NUCLEAR RIBOSOMAL DNA.

2. 1. Climbing the Trichoptera Tree : Investigations of Branches and Leaves

   Author : Tobias Malm; Kjell Arne Johanson; Wolfram Mey; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Trichoptera; Leptoceridae; Symphitoneuria; Gracilipsodes; Triplectides; morphology; DNA; systematics; phylogeny; New Caledonia; Madagascar; new species; new genus; Systematics and phylogenetics; Systematik och fylogeni; Systematic Zoology; zoologisk systematik och evolutionsforskning;

   Abstract : The Trichoptera (caddisflies) is the largest of the primary aquatic insect orders, currently including more than 13,500 species. With more than 100 species new to science described annually, the known caddisfly diversity is rapidly increasing. In the first four papers of this Thesis, a total of 22 species new to science are described. READ MORE

4. 2. NMR studies of DNA/RNA-binding proteins

   Author : Helena Berglund; KTH; []
   Keywords : ;

   Abstract : This thesis concerns the structure and internal dynamics inDNA and RNA-binding proteins. While it has long been known thata proper three-dimensional structure is essential for aprotein's ability to interact with other biomolecules, theinfluence of the inherent protein dynamics is less wellunderstood. READ MORE

5. 3. Insights into the roles of the essential Pfh1 DNA helicase in the nuclear and mitochondrial genomes

   Author : Parham Pourbozorgi Langroudi; Nasim Sabouri; Anders Hofer; Per Sunnerhagen; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; G4; genome integrity; Pfh1; Top1; helicase; topoisomerase; replication; transcription;

   Abstract : Eukaryotic cells have two sets of genomes, the nuclear and mitochondrial, and both need to be accurately maintained. Also, the rate of transcription must be precisely regulated in these genomes. However, there are many natural barriers that dysregulate these processes. READ MORE

6. 4. Disentangling the Reticulate History of Polyploids in Silene (Caryophyllaceae)

   Author : Magnus Popp; Bengt Oxelman; Magnus Lidén; Jeff J. Doyle; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Silene; Sileneae; polyploidy; low copy nuclear DNA; RNA polymerase; RPA2; RPB2; RPD2; internal transcribed spacer; rps16; psbE-petL; concerted evolution; reticulate evolution; lineage sorting; Biologi; Biology; Biologi;

   Abstract : DNA sequences from the rps16 intron and the psbE-petL spacer from the chloroplast genome, the ribosomal nuclear ITS region, and introns from the low copy nuclear genes RPA2, RPB2, RPD2a and RPD2b, are in different combinations used to infer phylogenetic relationships in Sileneae (Caryophyllaceae). Used in concert, the biparentally inherited nuclear regions are useful to distinguish between paralogy due to allopolyploidy and single gene duplications, respectively, because the latter are not expected to give rise to repeated phylogenetic patterns in potentially unlinked sequence regions. READ MORE

7. 5. Transcriptional regulation of ribosomal RNA gene : actin, myosin and beyond

   Author : Aishe Angeletti Sarshad; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : In the eukaryotic cell nucleus, actin and nuclear myosin 1c (NM1) are key regulators of RNA polymerase I (Pol I) transcription and function across the entire ribosomal RNA biogenesis pathway. At the gene level, actin interacts with Pol I and together with NM1 they have been suggested to facilitate assembly of Pol I at the gene promoter. READ MORE