Search for dissertations about: "ancestral"

Showing result 21 - 25 of 144 swedish dissertations containing the word ancestral.

  2. 21. Exploration of microbial diversity and evolution through cultivation independent phylogenomics

    Author : Joran Martijn; Thijs J.G. Ettema; Andrew Roger; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cultivation independent genomics; metagenomics; single-cell genomics; metagenomic binning; phylogenetics; phylogenomics; phylogenetic artefacts; comparative genomics; gene tree-species tree reconciliation; rRNA amplicon sequencing; Tara Oceans; origin of mitochondria; Alphaproteobacteria; Rickettsiales; Haloarchaea; endosymbiosis; Biologi med inriktning mot molekylär evolution; Biology with specialization in Molecular Evolution;

    Abstract : Our understanding of microbial evolution is largely dependent on available genomic data of diverse organisms. Yet, genome-sequencing efforts have mostly ignored the diverse uncultivable majority in favor of cultivable and sociologically relevant organisms. READ MORE

  4. 22. Evolution of acetylcholine receptors and study of the anatomy of the mouse brain reward system

    Author : Julia Pedersen; Dan Larhammar; Arnaud Chatonnet; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ventral Tegmental Area; Mesocorticolimbic system; Glutamate; Optogenetics; Histology; Acetylcholine; Receptor; Muscarininc; Nicotinic; G protein-coupled receptor; Gene duplication; Tetraploidization; Synteny; Paralogon; Ohnolog; Zebrafish; Spotted gar; Neuroscience; Neurovetenskap;

    Abstract : This thesis work is divided in two parts. In the first part, I make use of the transgenic TRPV1-Cre mouse line as a tool to investigate the midbrain ventral tegmental area (VTA). READ MORE

  5. 23. Pollen and pollination in Ephedra (Gnetales)

    Author : Kristina Bolinder; Catarina Rydin; Johan Ehrlén; Michael S Zavada; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; aerodynamics; evolution; moonlight; pollination; pollen morphology; ultrastructure; växtsystematik; Plant Systematics;

    Abstract : Ephedra (Gnetales) is a gymnosperm genus with a long evolutionary history; the first dispersed pollen grains with affinity to the group are known already from the Permian. This thesis focuses on the evolutionary history of the group and different aspects of its pollination mechanisms. READ MORE

  6. 24. Evolutionary and Pharmacological Studies of NPY and QRFP Receptors

    Author : Bo Xu; Dan Larhammar; Samuel Svensson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Neuropeptide Y; genome duplication; Evolution; vertebrate; Pharmacology; Modelling; Kinetics; Bioinformatik; Bioinformatics; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik; Biologi med inriktning mot evolutionär funktionsgenomik; Biology with specialization in Evolutionary Functional Genomics; Farmaceutisk farmakologi; Pharmaceutical Pharmacology;

    Abstract : The neuropeptide Y (NPY) system consists of 3-4 peptides and 4-7 receptors in vertebrates. It has powerful effects on appetite regulation and is involved in many other biological processes including blood pressure regulation, bone formation and anxiety. READ MORE

  7. 25. Evolution and Binding Mechanisms of Intrinsically Disordered Proteins

    Author : Elin Karlsson; Per Jemth; Kaare Teilum; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Intrinsically disordered proteins; Protein evolution; Binding kinetics; Binding mechanisms; Biophysical characterisation; Medicinsk biokemi; Medical Biochemistry;

    Abstract : Intrinsically disordered proteins (IDPs) make up a considerable fraction of the proteome in eukaryotic organisms. These proteins often act as hubs in interaction networks, harbouring multiple interaction with other proteins, and thus evolution has to walk a tightrope to accommodate new interactions while maintaining the previously established interactions. READ MORE