Search for dissertations about: "reductase-activity"

Showing result 1 - 5 of 16 swedish dissertations containing the word reductase-activity.

  2. 1. Photosynthetic nitrogen assimilation in green microalgae

    Author : Marie Larsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kväveassimilation - växtfysiologi; Kväveassimilation - grönalger;

    Abstract : Reduction of inorganic nitrogen (N0j, N0~) in illuminated Scamdumus obtuu-iuAculuA Chod. is coupled to photosynthetic electron transport. Uptake and reduction of NO^ are in balance with incorporation of reduced N during CO2 fixation; whereas in the absence of CO2, the cells liberate NH^ derived from NOj reduction. READ MORE

  4. 2. Studies on 7a-hydroxycholesterol in extrahepatic tissues and cells

    Author : Jie Zhang; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : In human liver, primary bile acids are synthesized from cholesterol via the well-established neutral and also via the recently described acidic pathways. The latter includes 27-hydroxycholesterol 7alpha-hydroxylase. READ MORE

  5. 3. Studies on N-linked glycosylation in proliferation and viability of normal and tumor cells in vitro

    Author : Magdalena Carlberg; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Apoptosis; DNA synthesis; IGF-1 receptor; HMG-CoA reductase; lovastatin; mevalonate; N-linked glycosylation; PDGF; SV40-transformation; tumor; tunicamycin.;

    Abstract : A number of studies suggest a critical role of N-linked glycosylation for cellular proliferation. In addition, many transformed and tumor cells have an altered 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase activity and an increased N-linked glycosylation. READ MORE

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

    Author : Liyue Huang; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : 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. READ MORE

  7. 5. Heme-copper oxidases and nitric oxide : Reaction mechanisms and supercomplex formation

    Author : Ingrid Albertsson; Pia Ädelroth; Alessandro Giuffrè; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Heme-copper oxidase; nitrite reductase; nitric oxide reductase; nitric oxide; supercomplex; Paracoccus denitrificans; denitrification pathway; proton transfer pathway; C-type oxidase; Helicobacter pylori; Biochemistry; biokemi;

    Abstract : In the denitrification process where nitrate is stepwise reduced to nitrogen gas, the toxic molecule nitric oxide (NO) is formed as an intermediate. Nitric oxide is produced by the enzyme cd1 Nitrite reductase (cd1NiR) by reduction of nitrite and is later reduced to nitrous oxide by nitric oxide reductase (cNOR). READ MORE