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  • Mutagenic mechanisms associated with perturbations of DNA precursor biosynthesis in phage T4

    Creator:
    Ji, Jiuping
    Abstract:
    A crucial factor in determining the accuracy of DNA replication is maintenance of a balanced supply of deoxyribonucleoside triphosphates (dNTPs) at replication forks. Perturbation of dNTP biosynthesis can induce dNTP pool imbalance with deleterious genetic consequences, including increased mutagenesis, recombination, chromosomal abnormalities and cell death. Using the T4 bacteriophage system,...
    Resource Type:
    Dissertation
    Full Text:
    committee members for their advice: Drs. G. D. Pearson, J. Hays, T. Lomax and C. J. Bayne. Finally, my

  • A role for maize ROP2 GTPase in the male gametophyte

    Creator:
    Carroll, Kirstin Arthur
    Abstract:
    ROP GTPases are crucial regulators of pollen tube growth. The Rop GTPase family in maize consists of nine known rop genes, ropl-rop9. A subset of these genes (rop2, rop8, and rop9) are expressed in pollen. The rop2 and rop9 genes are a highly conserved duplicate gene pair of ancient origin....
    Resource Type:
    Dissertation
    Full Text:
    like to thank each my committee members; C. Rivin, B. Taylor, O.Riera-Lizarazu, T. Lomax, and my

  • Seasonal and short-term nitrogen cycling in Populus

    Creator:
    Black, Brent L.
    Abstract:
    Poplar Bark Storage Proteins (BSP) are important in storing nitrogen (N) recovered from autumn-senescent leaves, and supply N for spring growth. Plants of Populus tremula x P. alba were transformed with a poplar BSP antisense cDNA fused to a double 35S promoter. Regenerated lines were screened for reduced BSP accumulation...
    Resource Type:
    Dissertation
    Full Text:
    guidance committee: B. Bond, P.J. Breen, T.L. Lomax, V.L. Hsu. I wish to thank my "adjunct" advisor Dr