Sökning: "Nitrite reductase"

Visar resultat 6 - 10 av 14 avhandlingar innehållade orden Nitrite reductase.

  1. 6. Theoretical studies of blue copper proteins

    Författare :Mats H M Olsson; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum chemistry; metal-thiolate bonds; axial ligation; electron transfer proteins; reduction potential; reorganisation energy; Cu II ; Cu I ; strain; Induced-rack theory; Entatic state theory; cytochrome c oxidase; CuA; nitrite reductase; azurin; Blue copper proteins; plastocyanin; B3LYP; CASPT2; Soil Science; agricultural hydrology; Lantbrukshydrologi; marklära;

    Sammanfattning : In this thesis, a critical investigation is presented about the role of mechanical strain for the electron-transfer properties of the blue copper proteins. It has been found that the structure of a realistic model complex of the oxidised blue-copper active site, optimised in vacuum with the B3LYP method, has the same trigonal cupric geometry as in the protein. LÄS MER

  3. 7. Kinetics of proton and electron transfer in heme-copper oxidases

    Författare :Peter Lachmann; Pia Ädelroth; Örjan Hansson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Heme-copper oxidase; electron transfer; proton transfer; nitric oxide reductase; ba3 oxidase; flow-flash; laser-flash photolysis; Biochemistry; biokemi;

    Sammanfattning : Heme-copper oxidases are transmembrane proteins that are found in aerobic and anaerobic respiratory chains. During aerobic respiration, these enzymes reduce dioxygen to water. The energy released in the reaction is used to transport protons across a biological membrane. LÄS MER

  4. 8. Nitric oxide formation from inorganic nitrate and nitrate : contribution from eukaryotic and prokaryotic pathways

    Författare :Liyue Huang; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Nitric oxide (NO) is an essential signaling molecule that plays a central role in a broad range of physiological functions. Classically, NO is synthesized from L-arginine and molecular oxygen by NO synthases. Once formed, it is rapidly oxidized to nitrite and nitrate. LÄS MER

  5. 9. Inorganic and organic nitrates as sources of nitric oxide

    Författare :Mirco Govoni; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Inorganic nitrate (NO3-) and nitrite (NO2-) have generally been considered stable inactive end products of nitric oxide (NO) or unwanted residues in the food chain. While several recent studies surprisingly demonstrate that nitrite is reduced to bioactive NO in blood and tissues, the more stable anion nitrate is still considered to be inert. LÄS MER

  7. 10. Metabolic responses ofPseudomonas stutzeriandEscherichia colisubjected to starvation and surplus of carbon/energy substrates in bioreactors

    Författare :Bo Xu; KTH; []
    Nyckelord :;

    Sammanfattning : Transient nitrite accumulation during anaerobicdenitrification is a widespread phenomenon for manydenitrifying bacteria includingPseudomonasstutzeri. Nitrate starvation caused the degradation ofthe second denitrifying enzyme nitrite reductase (NiR) inP.stutzeri. LÄS MER