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  • 1.
    Jedenheim, Linda
    et al.
    Halmstad University, School of Teacher Education (LUT).
    Eriksson, Johanna
    Halmstad University, School of Teacher Education (LUT).
    Försök till att lösa degraderingsproblem vid preparation av fotosystem I-subenheten PSI-N genom att använda proteasinhibitorer och olika sorters lysis2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The process where light is converted into chemical energy is called photosyntesis. The reaction takes place in the thylakoid membrane and is driven by two major protein complexes, photosystem II (PSII) and photosystem I (PSI) when energy in form of photons are received. PSI-N, a subunit in PSI, is a smaller protein with a mass of approximately 10 kDa. In some way, which is not yet clarified, PSI-N collaborates with PSI-F and plastocyanin when plastocyanin is docking to PSI. It is therefore important to purify larger amounts of the protein to acquire deeper knowledge of its structure and function. In earlier research the PSI-N protein has been expressed in Escherichia coli (E.coli). The problem has been degradation of the fusion protein after lysis. Our goal with this project is to obtain the purified protein intact using mechanic lysis and protease inhibitors.

  • 2.
    Kaminska, Hanna
    et al.
    Wroclaw University of Technology.
    Rögnvaldsson, Thorsteinn
    Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), Intelligent Systems´ laboratory.
    Assessment of the new scoring function for protein identification by PMF2010In: Acta Biochimica Polonica, Supplement 1, 2010, Warszawa, Poland: Polish Biochemical Society , 2010, p. 34-34Conference paper (Other academic)
  • 3.
    Stevens, DR
    et al.
    Department of Biology, University College London, UK.
    Atteia, A
    Department of Plant Physiology, Botanical Institute, Göteborg University, Sweden.
    Franzén, Lars-Gunnar
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Plant Cell Biology: Energy transduction in plant cells.
    Purton, S
    Department of Biology, University College London, UK.
    Cycloheximide resistance conferred by novel mutations in ribosomal protein L41 of Chlamydomonas reinhardtii2001In: Molecular General Genetics, ISSN 0026-8925, E-ISSN 1432-1874, Vol. 264, no 6, p. 790-795Article in journal (Refereed)
    Abstract [en]

    Although most eukaryotic cells are sensitive to the 80S ribosome inhibitor cycloheximide (CYH), naturally occurring CYH resistance is widespread amongst yeast species. The primary determinant of resistance appears to be a single residue within ribosomal protein L41; resistance is acquired by the substitution of a conserved proline (P-56) by a glutamate residue. We have isolated the L41 gene (RPL41) from the green alga Chlamydomonas and investigated the molecular basis of CYH resistance in various mutant strains. In both the wild-type strain and the mutant act-1, a proline is found at the key position in L41.; However, analysis of six independently isolated act-2 mutants reveals that all have point mutations that replace the proline with either leucine or serine. Of the two changes, the leucine mutation confers significantly higher levels of CYH resistance. This work identifies the ACT-2 locus as RPL41 and provides a possible dominant marker for nuclear transformation of C. reinhardtii.

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