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Articles 1 - 7 of 7
Full-Text Articles in Genetics and Genomics
Evaluating Mechanisms Of Rna Editing In Plants, Lexis Funk, Weishu Fan, Jeffrey P. Mower
Evaluating Mechanisms Of Rna Editing In Plants, Lexis Funk, Weishu Fan, Jeffrey P. Mower
UCARE Research Products
RNA editing is one of several post-transcriptional RNA processes. This process generates RNA and protein diversity in eukaryotes and results in specific amino acid substitutions, deletions, and changes in gene expression levels. It occurs in both plastids and mitochondria and typically involves the changing of specific C to U (cytosine to uracil). Welwitschia belongs to the gymnosperms (a group of seed-producing plants that includes conifers, cycads, Ginkgo, and Gnetales). It has already been substantiated that Welwitschia mirabilis has a major loss of cis-spliced introns and unusual trans-splicing introns. Research in the Mower lab has already proven that ancestral gymnosperm has …
Non-Essentiality Of Alr And Muri Genes In Mycobacteria, Philion L. Hoff, Denise Zinniel, Raúl G. Barletta
Non-Essentiality Of Alr And Muri Genes In Mycobacteria, Philion L. Hoff, Denise Zinniel, Raúl G. Barletta
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Amino acids are the building blocks of life. If DNA is the blueprint, amino acids are the lumber that proteins are built with. Proteins are built with left-handed, L- forms of amino acids. Bacteria have an essential cell wall component that happens to be an exception: peptidoglycan. Bacteria have enzymes called racemases that convert L- amino acid forms into right-handed, D- forms. Amino acids participate in many reactions with keto acids. Transaminases allow conversion between amino acids by transfer of an amino group.
Previous reports claimed there is no D-ala transaminase activity in mycobacteria and thus alr and murI genes …
Analysis Of Morphology And Secretion Mutants In Aspergillus Nidulans, Shelby N. Holaday, Steven D. Harris
Analysis Of Morphology And Secretion Mutants In Aspergillus Nidulans, Shelby N. Holaday, Steven D. Harris
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Filamentous fungi are important economically and medically due to their capacity to produce secondary metabolites or as human and animal pathogens. The genes and molecular mechanism responsible for secretion is poorly understood. Using classical genetics, we derived temperature sensitive (Ts) fungal mutants in Aspergillis nidulans. These mutants were then analyzed for their secondary metabolite secretion capacity.
In this study, we used the Ts strains of A. nidulans to determine how knockouts affect morphological and protein secretion by examining the phenotypes under the microscope and also by staining the mutants with Congo red staining. Mutants were stained with Congo red to …
Is A Mitochondrial Plasmid Really A Virus?, Mackenzie Strehle
Is A Mitochondrial Plasmid Really A Virus?, Mackenzie Strehle
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In addition to containing a large and complex mitochondrial genome, the mitochondria of several species of plants have been shown to contain an independent, self-replicating DNA molecule in the form of a plasmid. Plants in the Brassica genus contain a linear plasmid that is approximately 11.6 kilobases in length. The plasmid is characterized by the presence of terminal inverted repeats and covalently bonded proteins at its termini (Handa 2008). The plasmid also contains six ORFs that encode DNA and RNA polymerases and a number of unknown proteins (Figure 1). Currently, both the function of this plasmid and the mechanisms by …
Reducing The Potential For Acrylamide Formation In Wheat Products, Amy Hauver, P. Stephen Baenziger, Mary J. Guttieri
Reducing The Potential For Acrylamide Formation In Wheat Products, Amy Hauver, P. Stephen Baenziger, Mary J. Guttieri
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Acrylamide, a chemical formed from free asparagine and reducing sugars during high-temperature cooking via the Maillard reaction (i.e. frying or baking) of high starch foods is deemed ‘probably carcinogenic to humans’ based on its affect in mice. In April of 2002, a group of Swedish researchers reported findings that presented evidence that heat-treated, starch-rich foods contained high levels of acrylamide, later linking the production of acrylamide to the Maillard reaction. A number of other studies have been done to link dietary intake of acrylamide to human cancers and other health effects, although many have had inconclusive results. Nevertheless, the World …
Genetic Factors Affecting Hybrid Male Sterility Leading To Speciation, Patrick Opperman, Colin D. Meiklejohn
Genetic Factors Affecting Hybrid Male Sterility Leading To Speciation, Patrick Opperman, Colin D. Meiklejohn
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The process whereby speciation occurs can come about through the evolution of barriers to gene flow. One of these barriers to gene flow can be an incompatibility, which leaves hybrids dead or sterile. Two theories underlie the work of this experiment, Haldane’s Rule and the large X effect. Haldane’s Rule is the observation that unisexual inviability or sterility among species’ hybrids is almost always found in the heterogametic sex. The large X effect is the observation that substitution of one species’ X-chromosome for another’s has a disproportionately large effect on hybrid fitness compared to similar substitution of an autosome. For …
Examining Maternal Obesity Effects On Oogenesis, Follicular Development, And Embryonic Myogenesis, Chris Lindeman, Jennifer Wood
Examining Maternal Obesity Effects On Oogenesis, Follicular Development, And Embryonic Myogenesis, Chris Lindeman, Jennifer Wood
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The CDC estimates that more than one-third of U.S. adults (approximately 78.6 million) are obese. Despite national efforts to combat this with diet and exercise, the number of obese adults and children continues to climb. It is critical to emphasize that obesity can lead to lifelong, chronic complications and health risks including hypertension, heart disease, and diabetes.
Diet and obesity also have important impacts on the reproductive health of female including the ability to become pregnant (fertility) and risk for complications during pregnancy. Furthermore, for women who do become pregnant, obesity can affect the development of the embryo and fetus, …