Search for dissertations about: "transposon"

Showing result 1 - 5 of 29 swedish dissertations containing the word transposon.

  1. 1. Genetic dissection of tubulogenesis in the Drosophila trachea

    Author : Johanna Hemphälä; Christos Samakovlis; Reinhard Schuh; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Drosophila; trachea; transposon mutagenesis screen; fusion; Dpp; Delta; tubular dimensions; Grainyhead; Krotzkopf verkehrt; intralumenal matrix; Developmental biology; Utvecklingsbiologi;

    Abstract : The formation of branched tubular organs, such as the mammalian lung kidney and vascular system, is an essential process in animal development. The Drosophila tracheal (respiratory) system provides a genetic model system to study the highly ordered process of branch outgrowth and fusion required to form continuous tubular networks. READ MORE

  2. 2. Co-operative recombination mechanisms promoting gene clustering and lateral transfer of antibacterial drug resistance

    Author : Masood Kamali-Moghaddam; Uppsala universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical biosciences; Tn5090 Tn402; Mu-like transposons; serine recombinases; res site; integrons; Farmaceutisk biovetenskap; Biopharmacy; Biofarmaci; Pharmaceutical Microbiology; farmaceutisk mikrobiologi;

    Abstract : Transposons of the Mu superfamily are widespread and have been shown to play an important role in the dissemination of antibiotic resistance among microorganisms. One of these elements, Tn5090/Tn402 is the basal vehicle of the type 1 integrons in which mobile resistance gene cassettes are inserted to form clusters and operons. READ MORE

  3. 3. Studies on two bacterial resistance mechanisms to ß-lactam antibiot : extended spectrum ß-lactamases in Klebsiella oxytoca and methicillin resistance in staphylococci

    Author : Shang Wei Wu; Karolinska Institutet; Karolinska Institutet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP;

    Abstract : Eleven clinical isolates of Klebsiella oxytoca from Stockholm hospitals were found to be resistant to aztreonam and cefuroxime (MIC > 16 mg/L). The resistance was caused by a ß-lactamase with pI 5.25 and designated KH. Assay of the substrate profiles revealed that the KH ß-lactarnase was similar to the chromosomally encoded OXY-2 ß-lactamase. READ MORE

  4. 4. Full circle : Rise and fate of genetic variation in Marasmius oreades fairy rings

    Author : Markus Hiltunen; Hanna Johannesson; Martin Ryberg; Jason Stajich; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; mushroom; fairy ring; Marasmius; mutation; fungi; genomics; Biology with specialization in Systematics; Biologi med inriktning mot systematik;

    Abstract : Genetic variation is a prerequisite for evolution. The degree of variability within a species is governed by forces including mutation, recombination and selection. READ MORE

  5. 5. Telomeric DNA in Chironomus, a naturally telomerase-free system

    Author : Monika Rosén; Udo Häckers grupp Utvecklingsbiologi i invertebrater; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Biology; Chironomus; extrachromosomal telomeric repeats; RNA-DNA complex; 3´overhang; telocentric chromosome end; Telomere; complex repeats; Biologi; Genetics; cytogenetics; Genetik; cytogenetik;

    Abstract : Telomeres are specialized complexes of DNA and associated proteins that protect the ends of eukaryotic chromosomes. Although most organisms have short repeated DNA sequences at their telomeres, which are specified and maintained by the enzyme telomerase, there are a few exceptions. READ MORE