Sökning: "Molecular Phylogeny"

Visar resultat 1 - 5 av 108 avhandlingar innehållade orden Molecular Phylogeny.

1. 1. The Biodiversity of Hydrogenases in Frankia : Characterization, regulation and phylogeny

   Författare :Melakeselam Leul Zerihun; Anita Sellstedt; Kornel Kovács; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biodiversity; Frankia; immunoblotting; gene expression; uptake hydrogenase; hydrogen-evolving hydrogenase; nickel; phylogeny; Molecular biology; Molekylärbiologi;

   Sammanfattning : All the eighteen Frankia strains isolated from ten different actinorhizal host plants showed uptake hydrogenase activity. The activity of this enzyme is further increased by addition of nickel. Nickel also enhanced the degree of hydrogenase transfer into the membranes of Frankia, indicating the role of this metal in the processing of this enzyme. LÄS MER

3. 2. Marine non-heterocystous cyanobacteria : diazotrophic characterization & molecular phylogeny

   Författare :Pernilla Lundgren; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cyanobakterier;

   Sammanfattning : .... LÄS MER

4. 3. Phylogeny of Ixoroideae : molecular systematics within Rubiaceae

   Författare :Katarina Andreasen; Uppsala universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : .... LÄS MER

5. 4. The evolution of ribonucleotide reductases

   Författare :Daniel Lundin; Anthony Poole; Britt-Marie Sjöberg; Christos Ouzounis; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Evolution; ribonucleotide reductase; horizontal gene transfer; phylogeny; protein classification; Molecular biology; Molekylärbiologi; Molecular Biology; molekylärbiologi;

   Sammanfattning : Ribonucleotide reductase (RNR) catalyses the transformation of RNA building blocks, ribonucleotides, to DNA building blocks, deoxyribonucleotides. This is the only extant reaction pathway for de novo synthesis of DNA building blocks and the enzyme is thus necessary for life. RNR is found in all but a few organisms. LÄS MER

7. 5. Phylogeny and macroevolution in Isoetes (Isoetales)

   Författare :Eva Larsén; Catarina Rydin; Niklas Wikström; Ove Eriksson; Richard Bateman; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bayesian inference; biogeography; Cenozoic; genomic data; fossil calibration; Isoetes; Isoetales; megaspore morphology; Mesozoic; molecular clocks; node ages; phylogeny; rhizomorphic lycopsids; scanning electron microscopy; Plant Systematics; växtsystematik;

   Sammanfattning : This thesis has focused on the evolutionary history of Isoetes (Isoetales, Lycopsida), its phylogeny, megaspore morphology and evolutionary path through deep time. With a broadened sampling of species to include more of the worldwide diversity of the genus compared to previous work an unexpected sister to the rest of the genus was found. LÄS MER