Sökning: "avhandling evolution"

Visar resultat 11 - 15 av 174 avhandlingar innehållade orden avhandling evolution.

  1. 11. Basal Vertebrate Divergences from a Molecular Perspective

    Författare :Ann-Sofie Rasmussen; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mitochondrial genomes; Agnatha; Chondrichthyes; vertebrates; evolution; systematics; Genetics; cytogenetics; Genetik; cytogenetik;

    Sammanfattning : Fishes (Superclass Pisces) constitute the most numerous and morphologically diverse vertebrate group, yet only a small fraction of all molecular evolutionary studies concern piscine evolution. This thesis aims to investigate the vertebrate tree, through the analysis of mitochondrial (mt) DNA sequences. LÄS MER

  3. 12. Virus tropism and neutralization response in SIV infection

    Författare :Anna Laurén; Avdelningen för medicinsk mikrobiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Naturvetenskap; Natural science; Medicin människa och djur ; Medicine human and vertebrates ; HIV; SIV; mode of CCR5 use; CD4-independence; macrophage tropism; coreceptor use; neutralization; evolution; pathogenesis;

    Sammanfattning : Simian immunodeficiency virus (SIV) infections in macaques are commonly used as models to study the pathogenesis of human immunodeficiency virus (HIV). Both SIV and HIV normally use the CD4 receptor and an additional coreceptor for cell entry. The most common coreceptors used by HIV are CCR5 and CXCR4. LÄS MER

  4. 13. Ecological and evolutionary assembly processes and metacommunity structure

    Författare :Mikael Pontarp; Evolutionär ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Community; metacommunity; phylogenetic signal; ecology; evolution; assembly process; marine bacteria; habitat filtering; competition; mathematical modeling; simulation; eco-evolutionary;

    Sammanfattning : This thesis aims to elucidate the link between abiotic and biotic effects and biogeographical contingencies, eco-evolutionary assembly processes, and community structure in a spatially explicit metacommunity framework. To this end, we used structure analysis of naturally sampled and experimentally manipulated marine bacterial communities and mathematical eco-evolutionary modeling and simulations of metacommunity assembly. LÄS MER

  5. 14. Antibody Evolution and Repertoire Development

    Författare :Johan Lantto; Institutionen för immunteknologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Immunology; serology; transplantation; Immunologi; serologi; virus neutralization; trinucleotide repeat; insertion; immunoglobulin variable genes; human cytomegalovirus; glycoprotein B; deletion; antibody; antibody repertoire;

    Sammanfattning : Antibodies are key players of the immune system in higher vertebrates, which provide a defense against potentially lethal threats from the environment. Besides their importance in the immune defense, antibodies have a great potential as reagents in biological chemistry and diagnostics, and as therapeutic agents against both infectious diseases and cancer. LÄS MER

  7. 15. On protein structure, function and modularity from an evolutionary perspective

    Författare :Robert Pilstål; Björn Wallner; Maria Sunnerhagen; Mauno Vihinen; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bioinformatics; structure; biology; intrinsical; disorder; protein; sequence; evolution; mutation; epistasis; function; allostery; dynamics; simulation; prediction; graph; network; bioinformatik; struktur; biologi; strukturbiologi; intrinsiellt; oordnad; protein; sekvens; evolution; mutation; epistasis; funktion; allosteri; dynamik; simulation; prediktion; graf; nätverk;

    Sammanfattning : We are compounded entities, given life by a complex molecular machinery. When studying these molecules we have to make sense of a diverse set of dynamical nanostructures with wast and intricate patterns of interactions. LÄS MER