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Theses and Dissertations (ETD)

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Articles 31 - 35 of 35

Full-Text Articles in Medical Biochemistry

The Role Of Fgf Signaling In Retinal Development, Abbie A. Hartge Dec 2008

The Role Of Fgf Signaling In Retinal Development, Abbie A. Hartge

Theses and Dissertations (ETD)

The development of the retina is a precise balance between intrinsic competence and extrinsic factors. This interplay is known to regulate the generation of cell types in the developing retina and similar mechanisms have been found in other regions of the CNS. In the developing retina, FGFs are a large family of secreted polypeptide growth factors. Fgf15 is the major Fgf expressed during retinal development in mice. Fgf15 is an example of an FGF that has been shown to control proliferation, cell fate specification, differentiation and migration during development. In this thesis I used analysis of specific genes throughout retinal …


Advances In Dna Affinity Chromatography, William Himanshu S. Gadgil Jun 2001

Advances In Dna Affinity Chromatography, William Himanshu S. Gadgil

Theses and Dissertations (ETD)

Different aspects of DNA affinity chromatography such as DNA complexity heparin elution, the Bi-column method and the oligonucluotide trapping method were studied. The complexity (length) of a DNA sequence attached to an affinity chromatography column affects column retention, and the purity of transcription factors obtained. T18: A18 tailed DNA affinity columns were better suited for purification of most of the transcription factors than either the discrete or concatemeric DNA affinity columns. A novel method using heparin for eluting transcription factors from DNA Sepharose columns was characterized. The amount of the lac repressor chimera which eluted from the column was shown …


Characteristics Of The Recovery Of The Coenzyme A-Synthesizing Protein Complex From Saccharomyces Cerevisiae, Stanley Joseph Tarnowski Jr. Dec 1979

Characteristics Of The Recovery Of The Coenzyme A-Synthesizing Protein Complex From Saccharomyces Cerevisiae, Stanley Joseph Tarnowski Jr.

Theses and Dissertations (ETD)

A multienzyme complex contained in Bakers' yeast (Saccharomyces cerevisiae) which synthesizes CoA has been named the coenzyme A-synthesizing protein complex (CoA-SPC). The CoA-SPC has been shown to be insoluble in the crude Bakers' yeast cell lysate formed by exposing the yeast cell to ether and dry ice. Only after solubilization has this multienzyme complex been shown to catalyze the formation of bound dephospho-CoA utilizing the substrates adenosine triphosphate, D-pantothenic acid and L-cysteine. A low molecular weight component or components of the soluble fraction of the yeast cell and chloride ion appears to be responsible for the solubilization of CoA-SPC. This …


The Synthesis Of Active Site Directed Inhibitors For The Lac Permease Of Escherichia Coli, Mahmoud Ahmed Jun 1974

The Synthesis Of Active Site Directed Inhibitors For The Lac Permease Of Escherichia Coli, Mahmoud Ahmed

Theses and Dissertations (ETD)

No abstract provided.


The Purification, Properties And Subunit Structure Of Glycerol Dehydrogenase, Michael James Barrett Dec 1969

The Purification, Properties And Subunit Structure Of Glycerol Dehydrogenase, Michael James Barrett

Theses and Dissertations (ETD)

The inducible, NAD-linked glycerol dehydrogenase (E.C. 1.1.1.6) of a guanine requiring mutant of A. aerogenes has been purified to homogeneity. The molecular weight of the pure enzyme was found to be 3.4 x 105 daltons. The sedimentation coefficient of the enzyme was 10.7 x 10-13 sec.-1. The diffusion constant was 3.07 x 10-7 cm2/sec.

The partial specific volume calculated from the amino acid composition was 0.72 ml/g. The following kinetic parameters were determined; Km glycerol, 2.4 x 10-3 m, Km NAD, 2.8 x 10-4 M, Km dihydroxyacetone, 5.1 …