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Full-Text Articles in Life Sciences

Improving Codon Evolution Models Using Complex Mutation Models, Preston Hewgley Mar 2013

Improving Codon Evolution Models Using Complex Mutation Models, Preston Hewgley

Pursuit - The Journal of Undergraduate Research at The University of Tennessee

This paper discusses an improvement in a Stochastic Evolutionary Model of Protein Production Rate (SEMPPR) by revising the method by which it models mutation. SEMPPR previously assumed unbiased mutation, an assumption whose inaccuracy is made clear by observed codon counts of low-expression genes, where mutation determines equilibrium state. This paper presents a new, more complex model generalized on a per-codon basis and calculated from observed codon frequencies using a maximum likelihood framework. Results obtained from SEMPPR using the codon specific mutation model proved more accurate in predicting a protein’s production rate, reaffirming that complex mechanisms govern codon mutation rates.


Metabolic Rescue Of “Glucose Addicted” Cancer Cells In Vitro, Paolo Vignali Mar 2013

Metabolic Rescue Of “Glucose Addicted” Cancer Cells In Vitro, Paolo Vignali

Pursuit - The Journal of Undergraduate Research at The University of Tennessee

Transformations in the glycolytic metabolism of neoplasms modulate their robust cellular division. This characteristic leads to an “addiction” to glucose for continued proliferation and viability. This study investigated whether glucose metabolites could rescue cellular viability in glucose-starvation conditions, a model of the inter-tumoral nutrient-deficient environment. Findings illustrated potential cellular viability rescue with pyruvate addition in glucose-deprived conditions, yet the same potential was not observed with lactic acid, a metabolite that exists at characteristically high concentrations within the intertumoral microenvironment. These results could implicate a predominance of certain metabolic pathways in nutrient-starved cells. Molecular transport capacities across plasma membranes are tied …


Front Matter, Southeastern Fishes Council Jan 2013

Front Matter, Southeastern Fishes Council

Southeastern Fishes Council Proceedings

No abstract provided.


Post-Hurricane Katrina Survey For The Blackmouth Shiner (Notropis Melanostomus) At Historical Localities In Mississippi, Martin T. O'Connell, Anne M. Usee O'Connell Jan 2013

Post-Hurricane Katrina Survey For The Blackmouth Shiner (Notropis Melanostomus) At Historical Localities In Mississippi, Martin T. O'Connell, Anne M. Usee O'Connell

Southeastern Fishes Council Proceedings

No abstract provided.


Reproductive Biology Of The Frecklebelly Darter, Percina Stictogaster (Teleostei: Percidae), David J. Eisenhour, Audrey M. Richter, Lynn V. Eisenhour, Carol-Rose Gingras Jan 2013

Reproductive Biology Of The Frecklebelly Darter, Percina Stictogaster (Teleostei: Percidae), David J. Eisenhour, Audrey M. Richter, Lynn V. Eisenhour, Carol-Rose Gingras

Southeastern Fishes Council Proceedings

No abstract provided.


Minutes, Business Meeting, 37th Annual Meeting, Southeastern Fishes Council, Southeastern Fishes Council Jan 2013

Minutes, Business Meeting, 37th Annual Meeting, Southeastern Fishes Council, Southeastern Fishes Council

Southeastern Fishes Council Proceedings

No abstract provided.


Rediscovery Of A Lost Paratype Of The Boulder Darter, Etheostoma Wapiti, Michael H. Doosey Jan 2013

Rediscovery Of A Lost Paratype Of The Boulder Darter, Etheostoma Wapiti, Michael H. Doosey

Southeastern Fishes Council Proceedings

No abstract provided.


2011 Treasurer's Report For The Southeastern Fishes Council, Southeastern Fishes Council Jan 2013

2011 Treasurer's Report For The Southeastern Fishes Council, Southeastern Fishes Council

Southeastern Fishes Council Proceedings

No abstract provided.