Search for dissertations about: "Schiff-base intermediate"

Found 5 swedish dissertations containing the words Schiff-base intermediate.

  2. 1. Crystallographic studies of transaldolase : implications for the enzymatic mechanism and the evolution of class I aldolases

    Author : Jia Jia; Karolinska Institutet; Karolinska Institutet; []
    Keywords : transaldolase; aldolase; Schiff-base intermediate; protein crystallography; site directed mutagenesis; catalytic mechanism; circular permutation.;

    Abstract : Transaldolase catalyzes the reversible transfer of a dihydroxyacetone moiety from a ketose donor to an aldose acceptor by forming a Schiff-base intermediate between a Iysine residue and dihydroxyacetone. It belongs to the class I aldolase family. READ MORE

  4. 2. Catalysts for Oxygen Production and Utilization : Closing the Oxygen Cycle: From Biomimetic Oxidation to Artificial Photosynthesis

    Author : Erik Karlsson; Jan-Erling Bäckvall; Björn Åkermark; Jerker Mårtensson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; oxygen; catalytic oxidation; biomimetic oxidation; artificial photosynthesis; water oxidation; DFT calculations; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

    Abstract : This thesis describes the development and study of catalysts for redox reactions, which either utilize oxygen or hydrogen peroxide for the purpose of selectively oxidizing organic substrates, or produce oxygen as the necessary byproduct in the production of hydrogen by artificial photosynthesis.The first chapter gives a general introduction about the use of environmentally friendly oxidants in the field of organic synthesis, and about the field of artificial photosynthesis. READ MORE

  5. 3. The transaldolase family : structure, function and evolution

    Author : Stina Thorell; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The transaldolase gene family includes representatives from all kingdoms of life and the encoded enzymes are important for carbohydrate metabolism. The family can be divided into two subfamilies; Classical transaldolases and the MipB/TalC proteins. READ MORE

  6. 4. Visualizing structural dynamics: from small molecules to membrane proteins

    Author : Magnus Andersson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; membrane protein; bacteriorhodopsin; proteorhodopsin; halorhodopsin; structural dynamics; time-resolved X-ray scattering;

    Abstract : To fully understand the mechanism of a chemical reaction, it is important to characterize the rapid structural dynamics of transient chemical species as the reaction propagates. Since chemical processes are heavily influenced by the solvent in which they occur, the interaction with the surrounding solution also needs to be elucidated. READ MORE

  7. 5. Structural studies of lumazine synthases : thermostability, catalytic mechanism and molecular assembly

    Author : Xiaofeng Zhang; Karolinska Institutet; Karolinska Institutet; []
    Keywords : X-ray crystallography; lumazine synthase; thermostability; catalytic mechanism; molecular assembly;

    Abstract : Riboflavin, also known as vitamin B2, is biosynthesized in plants, bacteria, archaea and fungi. The primary biological function of riboflavin is related to its existence as a component of the two coenzymes, flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), which play an important role for electron transfer in energy metabolism. READ MORE