Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Cry proteins"”.
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The movement behavior and reproductive ecology of western corn rootworm beetles (coleoptera: chrysomeliae) in Bt cornfields with structured and seed blend refuges
… Berliner) corn hybrids expressing insecticidal Cry proteins since 2003. To slow the evolution of resistance to Cry proteins, the Environmental Protection Agency mandated an insect resistance management (IRM) plan requiring the planting of non-Bt refuges as structured blocks or randomly …
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Molecular and phylogenetic analysis of a Bacillus thuringiensis genetic locus
… 17A were investigated for the presence of novel Cry proteins. N-terminal amino acid, immunological and PCR analysis indicated that both strains contain a novel set of $\delta$-endotoxins. N-terminal amino acid sequence analysis indicated that the larger proteins from each strain (90 and 72-kDa of …
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Structural and functional insights to Bacillus spore germination and toxin engineering for sustainable agriculture
… lytic enzyme complexed with the YpeB and YlaJ proteins. Site directed mutagenesis guided by EV Couplings analysis lends weight to the model potentially revealing insight to how this critical enzyme is held in an inactive state during spore dormancy. Finally, the thesis additionally explores …
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Functional investigation of PERIOD in the mammalian circadian clock
… facilitated by a feedback loop in which PER and CRY proteins form complexes that repress CLOCK·BMAL1-driven transcription of the Period (Per) and Cryptochrome (Cry) genes. Whilst Per clock genes are essential for circadian rhythmicity, little is known about the cell-autonomous mechanisms that …
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Circadian Orchestration of the Cellular Proteome
… and translation of a core set of ‘clock proteins’. This cellular timekeeping system is remarkably precise and robust to perturbations. In the first chapter of this thesis I explored the mechanism of action of picrotoxin, a drug that shortens circadian period through unknown means. I …
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Improving Integrated Pest Management in Sweet Corn System
… sweet corn hybrids that produce insecticidal proteins derived from the bacteria Bacillus thuringiensis. However, over the past decade, CEW populations have developed resistance to both the Cry proteins found in many of the Bt sweet corn hybrids and pyrethroid insecticides, which has made …
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Western corn rootworm (Coleoptera: Chrysomelidae; Diabrotica virgifera virgifera LeConte) emergence and abundance in transgenic cornfields with structured and seed blend refuges
… Berliner) corn hybrids expressing toxic Cry proteins (i.e., Cry3Bb1, Cry34Ab1/35Ab1, mCry3a) for a decade. To delay western corn rootworm resistance to Bt toxins, growers must plant a non-Bt “refuge” in each Bt cornfield. This allows susceptible larvae to develop without exposure to the …
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Cellular clocks on steroids: the mechanism of circadian entrainment by glucocorticoids
… of the Period genes which encode the PER proteins, leading to an increase in the abundance of PER. As one of the central components regulating cellular rhythms, PER activity determines the circadian phase at which cells reside. However, much of the evidence for this model is correlatory; …
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Field-evolved resistance to Cry3Bb1 corn by the western corn rootworm: Investigations of resistance, emergence, node-injury ratings, and fitness
… dollar pest. Bt hybrids express various toxic Cry proteins (i.e., Cry3Bb1, Cry34Ab1/Cry35Ab1, mCry3A, eCry3.1Ab) which have proven to be valuable tools for protecting corn roots from western corn rootworm larval feeding. However, the western corn rootworm has repeatedly developed resistance to …