Search for dissertations about: "centromere"
Showing result 1 - 5 of 23 swedish dissertations containing the word centromere.
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1. Organization of centromere associated DNA in Chironomus pallidivittatus
Abstract : Centromeres have not yet been functionally defined in higher eu- karyotes, largely due to the huge amounts of repeated DNA in these regions of most species and difficulties of delimiting centromeric from pericentric regions. Also the latter have large quantities of mostly noncoding DNA, expressed cytologically as pericentric heterochromatin. READ MORE
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2. DNA in centromeres of Chironomus pallidivittatus
Abstract : The centromeres of most higher eukaryotes are embedded within large regions of constitutive heterochromatin and consist of large quantities of highly repetitive DNA. Transposable elements are also found in these regions. READ MORE
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3. Mediator and its role in non-coding RNA and chromatin regualtion
Abstract : Mediator is a multiprotein complex required for the regulation of RNA Polymerase II (Pol II) transcription. Mediator transmits regulatory signals from activators and repressors to the Pol II machinery at the promoter, but the complex has also many other functions related to control of gene transcription. READ MORE
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4. Repetitive DNA in search of a function - a study of telomeric and centromeric sequences in Chironomus
Abstract : Repetitive DNA is quantitatively the main component of telomeres and centromeres, structures responsible for maintenance of the eukaryotic chromosome. The telomere is the specialized nucleoprotein complex that terminates linear chromosomes. READ MORE
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5. Chromatin Structure: Nucleosome Formation and Positioning
Abstract : In all eukaryotic cells the DNA is complexed with a group of highly basic histone proteins forming nucleosomes and higher order chromatin structures. In the nucleosome the DNA is tightly wrapped, almost two turns, around an octamer of histone proteins. READ MORE