Search for dissertations about: "putrescine"

Showing result 1 - 5 of 13 swedish dissertations containing the word putrescine.

2. 1. Polyamines in foods and human milk

   Author : Mohamed Atiya Ali; Karolinska Institutet; Karolinska Institutet; []
   Keywords : putrescine;

   Abstract : Background: Knowing the levels of polyamines, putrescine, spermidine and spermine in foods and human breast milk, and the contribution of daily food choice to polyamine intake and its effect on the levels in breast milk is of interest, due to the association of these bioactive amines to health and disease. There is a lack of relevant information on the content of polyamines in the Swedish Food Database. READ MORE

4. 2. Effects of polyamine pool manipulation on genes expressed during the cell cycle

   Author : Pia Berntsson; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal physiology; cyclin A; ODC; MCF-7; mitotic shake off; DENSPM; CHO; cDNA microarray; cell cycle; spermine; Djurfysiologi; AdoMetDC; 2D gel electrophoresis; polyamines; spermidine; putrescine;

   Abstract : The polyamines - putrescine, spermidine and spermine - are polycations found within cells. They have been shown to be essential for optimal cell proliferation and cell survival. Cells maintain their polyamine levels in a well-regulated system involving biosynthesis, catabolism and uptake/excretion. READ MORE

5. 3. Structural Studies of Polyamine Biosynthesis Enzymes: Potential Targets for Drugs against Tropical Parasites

   Author : Veronica Tamu Dufe; Biokemi och Strukturbiologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; inhibitors; protein crystallography; Molecular biophysics; Molekylär biofysik; tropical parasites; polyamine biosynthesis enzymes;

   Abstract : Two enzymes involved in the biosynthesis of polyamines, ornithine decarboxylase (ODC, from human and Leishmania donovani) and spermidine synthase (SPDS, from Plasmodium falciparum and Caenorhabditis elegans) were studied using biochemical methods, homology modelling and X-ray crystallography. ODC catalyses the first and committed step in polyamine biosynthesis, the decarboxylation of ornithine to putrescine. READ MORE

6. 4. Factors modulating tRNA biogenesis and function in Saccharomyces cerevisiae

   Author : Fu Xu; Anders Byström; Marcus J. O. Johansson; Raffael Schaffrath; Umeå universitet; []
   Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; Translation; tRNA biogenesis; suppressor tRNA; Elongator complex; wobble uridine modifications; SUP4; YPK9; SSD1; serine tRNA; synthetic lethality; yeast; biology; biologi; molekylärbiologi; Molecular Biology; Genetics; genetik;

   Abstract : Transfer RNA (tRNA) genes are transcribed by RNA polymerase III as precursors that undergo multiple processing steps to form mature tRNAs. These steps include processing of the 5’ leader and 3’ trailer sequences, addition of a 3’ CCA tail, removal of introns, and formation of modified nucleosides. READ MORE

7. 5. Amines and Bacterial Vaginosis

   Author : Helen Wolrath; Linköpings universitet; []
   Keywords : MEDICINE; MEDICIN;

   Abstract : Bacterial Vaginosis (BY) is a common syndrome, with a prevalence of 10-30% in women of childbearing age. The decisive pathogenetic factoris thought to have a microbiological origin, but so far no specific bacteria have been implicated in causing BV. READ MORE