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Visar resultat 21 - 25 av 26 avhandlingar som matchar ovanstående sökkriterier.

1. 21. The surface complex of Euglena gracilis. Involvement in cellular movements and biochemical and molecular analyses of the components

   Författare :Silja K Petersen-Mahrt; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; UV-B radiation; tubulin; surface complex; plasma membrane; phylogeny; phototaxis; nitrogen deficiency; membrane skeleton; Euglena gracilis; actin; cell shape; Physiological biophysics; Växtfysiologi;

   Sammanfattning : The flagellate Euglena gracilis shows rhythms in phototaxis and cell shape changes between oblong and round. Artificial UV-B radiation of 0.5 W m-2 caused a loss in phototaxis, but the peak of activity occurred at the same time as for control cells. LÄS MER

3. 22. Plasma membrane/cytoskeleton interactions in plants

   Författare :Anders Sonesson; Lunds universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Triton X-114; hydrophobic tubulin; tubulin; actin; cytoskeleton; Brij 58; inside-out; plasma membrane; plant; cauliflower; Physiological biophysics; Växtfysiologi;

   Sammanfattning : The way in which the cortical cytoskeleton associates to the plasma membrane (PM) must be elucidated to understand the structural dynamics of many processes in the plant cell. In the present study, isolated cauliflower (Brassica oleracea L.) PM vesicles were used to characterize membrane/cytoskeleton interactions. LÄS MER

4. 23. Protein phosphorylation in plant mitochondria

   Författare :André Struglics; Lund Ortopedi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; FoF1-ATPase; autophosphorylation; protein kinase activity; protein phosphorylation; Plant mitochondria; inner mitochondrial membrane; NDPK; Physiological biophysics; Växtfysiologi;

   Sammanfattning : Protein phosphorylation in the subcompartments of plant mitochondria was investigated by labelling with [gamma-32P]ATP and by SDS-PAGE/autoradiography. About 20 proteins in inside-out inner mitochondrial membranes from potato tubers were phosphorylated by endogenous protein kinases when incubated with [gamma-32P]ATP. LÄS MER

5. 24. Structural studies of metal-binding proteins revealing dynamic behaviour

   Författare :Maria Håkansson; Biokemi och Strukturbiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; Molekylär biofysik; Molecular biophysics; zinc; magnesium; superantigen; calbindin D9k; X-ray crystallography; staphylococcal enterotoxin; structure; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

   Sammanfattning : The Mg2+ and Mn2+ structures of calbindin D9k have been determined and they reveal a conformational change compared to the structures of apo and (Ca2+)2-calbindin D9k. These findings are unique, since normally calcium and not magnesium is known to induce conformational changes of EF-hand proteins. LÄS MER

7. 25. Protein Interactions: Electrostatics and Ligand Binding

   Författare :Ingemar André; Biofysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular biophysics; Molekylär biofysik; secondary structure formation; protein GB1; pKa values; pH stability; NMR; electrostatic interactions; M proteins; calbindin D9k; calcium binding; cooperativity; calmodulin; calbindin D28k;

   Sammanfattning : This thesis deals with Ca2+ binding to proteins, electrostatic interactions in and between proteins as well as inter- and intramolecular interactions. A computer program was developed to determine Ca2+ binding constants from experimental titration data of proteins. LÄS MER