Complex retroviruses have evolved to contain their own genes that promote the export of unspliced viral RNA from the nucleus to the cytoplasm. In HIV-1, for example, the viral Rev protein binds to the Rev Response Element sequence in viral RNA and directs the RNA to be exported from the ...
Transcription in eukaryotes is mediated by three RNA polymerases: I, II, and III. Each RNA polymerase synthesises one or more classes of RNA. RNA polymerase binds to the promoter region of DNA to initiate transcription of different types of RNA. RNA polymerase III is found in the nucl...
Give three different types of proteins found in or on cell membranes and the function of each. Membrane proteins: Membrane proteins are proteins that are embedded in the cell membrane of cells. They have a diverse range of different functions, and depending on the ce...
regionswiththeirbasesengagedinnon-Watson-Crick pairs,asbeautifullydemonstratedintherecentribosomal RNAstructures(Banetal.2000;Wimberlyetal.2000; Leontis and Westhof 2001; Leontis et al. 2002). The pre- formed helical domains associate into bundles of helices by ...
The quantitative characterization of the transcriptional control by histone modifications has been challenged by many computational studies, but most of them only focus on narrow and linear genomic regions around promoters, leaving a room for improvement
Purified recombinant Neu3.2 and Neu3.3 was used as enzyme source to characterize their ability to remove sialic acid from different substrates, namely GD1a, GD3, GM3 and GM1 gangliosides, fetuin, mucin and two types of oligosaccharides, namely α(2–3) sialyllactose and 3-sialyllactose, as rep...
objectives of this work were to conduct a more systematic analysis of common wheat genes encoding different types of cytosolic Hsp90 and to study their function in seedling growth and disease resistance. Materials and Methods Wheat materials and general molecular and bioinformatic methods Wheat materials...
Large bone defects have always been a great challenge for orthopedic surgeons. The use of a good bone substitute obtained by bone tissue engineering (BTE) may be an effective treatment method. Artificial hydroxyapatite, a commonly used bone defect filler
The functional Sxl protein regulates the splicing of transformer (tra) pre-mRNA, creating the functional splicing factor Tra. Tra, together with the RNA-binding protein Transformer-2 (Tra2) and other splicing factors, controls the sex-specific splicing of the pre-mRNA of two transcription factor...
Include the three major components and their roles. How many types of RNA and DNA are there in prokaryotes vs eukaryotes? In eukaryotes, ribosomal RNAs are transcribed by A. RNA polymerase I. B. RNA polymerase II. C. RNA polymerase III. D. RNA polymerase IV. Do prokar...