Search for dissertations about: "Cytosine"

Showing result 1 - 5 of 35 swedish dissertations containing the word Cytosine.

  2. 1. Quantum Chemical Studies of Enzymatic Reaction Mechanisms : Investigations of Cytosine Deaminase and ω-Transaminase

    Author : Bianca Manta; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In this thesis, density functional theory is used to study the reaction mechanisms of two dierent enzymes. Quantum chemical cluster models of the active sites were designed using available crystal structures. READ MORE

  4. 2. Quantum Chemical Studies of Enzymatic Reaction Mechanisms

    Author : Bianca Manta; Fahmi Himo; Lubomir Rulisek; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; density functional theory; B3LYP; enzyme; cluster approach; mechanism; zinc; manganese; cytosine deaminase; ω-transaminase; dinitrogenase reductase-activating glycohydrolase; dual substrate recognition; organisk kemi; Organic Chemistry;

    Abstract : Computer modeling of enzymes is a valuable complement to experiments. Quantum chemical studies of enzymatic reactions can provide a detailed description of the reaction mechanism and elucidate the roles of various residues in the active site. READ MORE

  5. 3. Computational discovery of DNA methylation patterns as biomarkers of ageing, cancer, and mental disorders : Algorithms and Tools

    Author : Behrooz Torabi Moghadam; Jan Komorowski; Manfred Grabherr; Jaak Vilo; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; DNA methylation; machine learning; biomarker; cancer; ageing; classification;

    Abstract : Epigenetics refers to the mitotically heritable modifications in gene expression without a change in the genetic code. A combination of molecular, chemical and environmental factors constituting the epigenome is involved, together with the genome, in setting up the unique functionality of each cell type. READ MORE

  6. 4. Fluorescent Nucleobase Analogues and their use for Investigating DNA Interactions

    Author : Anke Dierckx; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; FRET; B-DNA; circular dichroism; fluorescent nucleobase analogue; adenine analogue; duplex stability; Fluorescence quantum yield;

    Abstract : Ever since unravelling the structure of DNA, an expanding research field has emerged with ongoing efforts dedicated to increase our understanding of the molecule of life. Since the natural nucleobases are virtually non-emissive, it has been a challenge for decades to ‘light up’ DNA/RNA in order to investigate their properties utilizing fluorescence techniques. READ MORE

  7. 5. Quantitative analysis of DNA adducts formed by some epoxides of industrial importance

    Author : Kamila Plná; Karolinska Institutet; Karolinska Institutet; []
    Keywords : DNA adducts; 32P-postlabelling; cancer; genotoxicity; occupational; epoxides; allyl glycidyl ether; propylene oxide; epichlorohydrin;

    Abstract : The work presented herein has focused on DNA adduct formation by three industrial epoxides, allyl glycidyl ether, propylene oxide and epichlorohydrin. Epoxides, owing to the strained oxirane ring are chemically reactive and can alkylate various sites in DNA. READ MORE