Search for dissertations about: "epistasis"

Showing result 1 - 5 of 22 swedish dissertations containing the word epistasis.

2. 1. Directed Evolution of Glutathione Transferases with Altered Substrate Selectivity Profiles : A Laboratory Evolution Study Shedding Light on the Multidimensional Nature of Epistasis

   Author : Wei Zhang; Bengt Mannervik; Bengt-Harald Jonsson; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; glutathione transferase; azathioprine; directed evolution; semi-rational design; catalytic mechanism; saturation mutagenesis; reduced amino acid alphabets; molecular docking; protein evolution; multivariate data analysis; epistasis; fitness landscape; evolutionary trajectories; Biochemistry; Biokemi; Biokemi; Biochemistry;

   Abstract : Directed evolution is generally regarded as a useful approach in protein engineering. By subjecting members of a mutant library to the power of Darwinian evolution, desired protein properties are obtained. Numerous reports have appeared in the literature showing the success of tailoring proteins for various applications by this method. READ MORE

4. 2. Mapping Genes Affecting Phenotypic Traits in Chicken

   Author : Susanne Kerje; Leif Andersson; Martien Groenen; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; chicken; Quantitative Trait Loci; growth; egg production; epistasis; plumage colour; Extended black; MC1R; Dominant white; PMEL17; Genetik; Clinical genetics; Klinisk genetik;

   Abstract : The purpose of gene mapping is to understand the underlying genetics of simple and complex traits like plumage colour and growth. This thesis is based on a cross between the wild ancestor of the modern chicken, the red junglefowl, and a White Leghorn line selected for high egg mass. READ MORE

5. 3. Complex Trait Genetics : Beyond Additivity

   Author : Simon Forsberg; Örjan Carlborg; Julien Ayroles; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; genetic interactions; epistasis; additivity; GWAS; vGWAS; Genetic mapping; yeast; Arabidopsis Thaliana; dog; Genetik; Genetics;

   Abstract : The link between the genotype and the phenotype of an organism is immensely complex. Despite this it can, to a great extent, be captured using models that assume that gene variants combine their effects in an additive manner. This thesis explores aspects of genetics that cannot be fully captured using such additive models. READ MORE

6. 4. Genetic characterization to dissect the phenotypic complexity of autoimmunity

   Author : Jenny C Karlsson; Immunologi; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; transplantation; Immunologi; serologi; serology; epistasis; EAE; autoimmunity; Immunology; CIA; QTL;

   Abstract : Autoimmune diseases are dependent on multiple genes and unknown environmental factors. Great efforts in the identification of genes conferring susceptibility to autoimmune diseases like Rheumatoid Arthritis (RA) and Multiple Sclerosis (MS) have recently been rewarding. READ MORE

7. 5. Mechanisms of Antibiotic Resistance Evolution

   Author : Michael Knopp; Dan Andersson; Anca Segall; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Antibiotic resistance evolution; Escherichia coli; Salmonella; porins; fitness; epistasis; strain-specificity; sub-MIC; de novo gene evolution;

   Abstract : The continuing emergence and spread of antibiotic resistant bacteria are a threat to various applications in modern medicine and impose a strong economic burden on health systems. The development of new antibiotics is slow and cannot counterbalance the dissemination of resistant bacteria. READ MORE