Sökning: "centromere"
Visar resultat 1 - 5 av 23 avhandlingar innehållade ordet centromere.
1. Organization of centromere associated DNA in Chironomus pallidivittatus
Sammanfattning : 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. LÄS MER
2. DNA in centromeres of Chironomus pallidivittatus
Sammanfattning : 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. LÄS MER
3. Mediator and its role in non-coding RNA and chromatin regualtion
Sammanfattning : 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. LÄS MER
4. Repetitive DNA in search of a function - a study of telomeric and centromeric sequences in Chironomus
Sammanfattning : 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. LÄS MER
5. Chromatin Structure: Nucleosome Formation and Positioning
Sammanfattning : 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. LÄS MER