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Creator:: Hanson, Eric Scott
Resource Type:: Dissertation
Full Text:: without dATP 119 4.9. Cross linking of R2 and a 43-kDa protein using DTSSB 121 4.10. R1/R2 synthesis and

Creator:: Young, James Patrick
Abstract:: The ability to faithfully replicate DNA is dependent upon the maintenance and regulation of its precursors, the deoxyribonucleoside triphosphates. Enzymes encoded by the bacteriophage T4 have been widely used as models of biochemical processes. A body of evidence supports the concept that the bacteriophage T4 enzymes involved in deoxyribonucleotide biosynthesis...
Resource Type:: Dissertation
Full Text:: paths cross again. I would like to thank my parents, Jim and Cheryl Young for their faith and support

Creator:: Chimploy, Korakod
Abstract:: In order to maintain genetic stability in eukaryotes, tight regulation of the relative sizes of deoxyribonucleoside triphosphate (dNTP) levels inside the cell is essential for optimal fidelity of DNA replication. Ribonucleotide reductase (RNR) is the enzyme responsible for proportional production of DNA precursors. Studies on regulation of this enzyme, the...
Resource Type:: Dissertation

Creator:: Sargent, Roy Geoffrey
Abstract:: Imbalanced deoxyribonucleoside triphosphate (dNTP) pools are mutagenic for DNA synthesis in both intact cells and cell-free replication systems. Almost certainly, such mutagenesis involves competition between correctly and incorrectly base-paired precursors at replication sites. However, there are certain differences between the intact cell and cell-free systems that do not always allow...
Resource Type:: Dissertation

Creator:: Martomo, Stella A.
Abstract:: Deoxyribonucleoside triphosphate (dNTP) concentrations measured in cells are not symmetric. dGTP almost always represents only 5-10% of the total dNTP pools in cells. In an in vitro replication system involving semiconservative replication from an SV 40 origin, the mutation frequency of an M13 phagemid replicated by human cell extracts in...
Resource Type:: Dissertation
Full Text:: newly discovered include poi 0 which possibly functions in repair of DNA cross-links (reviewed in

Creator:: Tassotto, Mary Lynn Benka
Abstract:: Intracellular dNTP pool sizes are highly asymmetric, with dGTP usually comprising 5 to 10% of the sum of the dNTP pools. The work presented in this dissertation addresses the question of whether the underrepresentation of dGTP is related to its potential to be oxidized by reactive oxygen species. 8-oxo-guanine is...
Resource Type:: Dissertation

Creator:: Hendricks, Stephen P.
Abstract:: The first committed step in DNA biosynthesis occurs by direct reduction of ribonucleotides. This reduction is catalyzed by ribonucleotide reductase (RNR), an enzyme which uses a unique radical mechanism to facilitate the transformation. All four DNA precursors are synthesized by a single enzyme. Therefore, an intricate pattern of regulation has...
Resource Type:: Dissertation
Full Text:: the carboxy-terminal residues of R2 by comparison with the cross-peak patterns of peptides of the

Creator:: Bernard, Mark Aguirre
Abstract:: Although the Escherichia coli host has almost all of the enzymes necessary to synthesize nucleotides needed for bacteriophage T4 DNA replication, phage genes expressed early in infection encode enzymes for de novo DNA precursor biosynthesis and salvage from degraded host DNA. Eight early enzymes and two host enzymes comprise the...
Resource Type:: Dissertation

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